TLDR: Your satisfaction with this item will depend on your need. If you want a all in one device - dash cam/rear camera/backup camera/GPS Speedometer/compass and the occasional rear camera view because your view is blocked - this is a must buy. But if you're planning on using this in rear camera mode all the time - this may not be the product for you.
I was surfing YouTube one day and came across a video of a Smart Rear View Mirror and was intrigued. I have a midsize SUV and with the cargo area full of boxes, balloons or people, I can't see out of the rear view mirror. I always wanted a rear view camera as well and this crossed off a lot of my needs. We've come a long way when a touch screen product like this with all these features is a little over a hundred dollars. I went with the 12" because I saw how the 10" rear view mirrors had to extend the camera out so your original mirror doesn't block it. So it ends up being 12" anyway and doesn't look as clean. But I made sure I measured everything and that my sun visor wouldn't block it before getting the 12". After two weeks with the mirror, here is my list of Pros and Cons:
Pros:
-Quick install. I mounted the rear camera with the double sided tape to the glass of my SUV tailgate. That way it doesn't get dirty or wet. The higher position also reduces the camera being blinded by headlights straight on at night as opposed to it being mounted by your license plate.
-At night, I find the screen at the lowest brightness works well. It's no brighter than the cars infotainment screen.
-The large screen makes navigating and watching recordings easy. The UI was surprisingly easy to navigate.
-Comes with a 32GB Mini SD Card so you're ready to go at the start. But I highly recommend getting a 64GB card, anything higher might cause issues.
-One of the reviews said you couldn't set the screen to display mph or 12 hour time. I was able to set both, either they fixed it via a firmware update and the new ones are updated or some people are just not tech savvy.
-My SUV already had a OEM crappy backup camera, so I didn't spend time tapping into the reverse light.
-There isn't a app to wireless transfer the recordings. So you have to plug the miniSD card into a computer. -Navigating the folders to the files are pretty intuitive. But if you need to have both the front and rear recordings playing at the same time, you'll need to download their GV Player. Which I will add as a Con below.
-Excellent and responsive customer service. Just make sure you email service.wolfbox@gmail.com and not what's listed in the manual.
Cons:
-Firmware. No mention anywhere how to update the firmware. I'll reach out to support to add me to the email list when new firmware is available.
-Speed warning setting. Can't change it from kph to mph, but a firmware update in the future could fix this. Not that big of a deal, since you will only have to set this once.
-No automatic brightness adjustments. In modern cars when the headlights come on, the tachometer and infotainment would dim accordingly. But I can see how this could be a liability as well.
-I use this as a normal mirror, but with the time/date and GPS overlay on it. I have noticed the glare issue others have noted - especially when it's overcast (even with all my windows tinted -except the front). But since I'm not using the rear camera live video feed 100% of the time, it doesn't bother me. I was more interested in the rear dash cam ability.
-I wish there was a saturation/hue and contrast setting, maybe in a future firmware update.
-The GV Player has a little bit of a learning curve, especially when there is no manual. The user interface is also dated. I also couldn't figure out how to get the GPS portion working in the software.
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WOLFBOX G840S 12" 4K Mirror Dash Cam Backup Camera, 2160P Full HD Smart Rearview Mirror for Cars & Trucks, Front and Rear View Dual Cameras, Night Vision, Parking Assistance, Free 32GB Card & GPS
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This Item  WOLFBOX G840S 12" 4K Mirror Dash Cam Backup Camera, 2160P Full HD Smart Rearview Mirror for Cars & Trucks, Front and Rear View Dual Cameras, Night Vision, Parking Assistance, Free 32GB Card & GPS |  |  |  |  |  | |
| Price | -48% $101.99 List: $197.99 | -25% $149.99 List: $199.99 | -20% $235.99 List: $294.99 | $249.99 | -10% $119.99 List: $133.49 | -40% $119.99 List: $199.99 |
| Delivery | Get it as soon as Tuesday, May 14 | Get it as soon as Tuesday, May 14 | Get it as soon as Tuesday, May 14 | Get it as soon as Tuesday, May 14 | Get it as soon as Tuesday, May 14 | Get it as soon as Tuesday, May 14 |
| Customer Ratings | ||||||
| Touch Screen | ||||||
| Camera quality | ||||||
| Night vision | ||||||
| Picture quality | ||||||
| Sold By | WolfBox Direct | DCAuto | WolfBox Direct | Pelsee US | Pelsee US | DCAuto |
| display type | LCD | — | LCD | LCD | LCD | LCD |
| display size | 12 feet | — | 12 inches | 12 inches | — | — |
| video resolution | 2160p | 2160p | 4K+2.5K | 4K Front + 2.5K Rear | 4K | 2160p |
| mounting type | Rearview Mirror Mount | Rearview Mirror Mount | Suction Mount | Rearview Mirror Mount | Rearview Mirror Mount | Rearview Mirror Mount |
| auto part position | front inside | front, rear | front right outer | rear | front, rear | front inside |
| control method | touch | touch | touch | touch | touch | touch |
| real angle of view | 140 degrees | 140 degrees | 140 degrees | — | 170 degrees | 170 degrees |
From the brand
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As the leading brand in the automotive electronics market, WOLFBOX has earned its reputation with an unwavering commitment to quality and durability.
At WOLFBOX, we understand that driving is more than just a means of transportation - it's an exploration, an adventure waiting to unfold.
WOLFBOX is your trusted companion, encouraging you to venture beyond your comfort zone and discover the extraordinary.
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Product Description
Extra-large Touch Screen
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Two Channel Replay
You can watch the videos from both the front and rear cameras on your computer at the same time, allowing you to monitor the entire surroundings of the car and saving you time.
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Adaptable Rear Cam
The rear camera can be freely adjusted in angle and comes with a flip function. If your view appears upside down while using it, you may need to use this feature to help you flip the perspective.
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Super Capacitor
The super capacitor can withstand temperatures from -4°F to 149°F,eliminating the risks of overheating, explosion,and melting. It also has a longer service life,twice as long as lithium-ion batteries
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Super Night Vision
It uses an upgraded low-reflectivity LCD to reduce daytime reflection. With advanced WDR&HDR technology, a starvis sensor, and a 6-glass lens, making nighttime driving easier.
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Time-lapse recording
Time-lapse recording allows you to capture an extended period of time by reducing the number of frames in the video, enabling you to see a recording of 24 hours in its entirety.
G-Sensor
The WOLFBOX mirror dash cam automatically starts recording in the event of a collision.
Loop-Recording
The rear view mirror camera automatically overwrites the oldest files, ensuring that you never miss any important videos.
GPS
With the GPS plugged in, the dash cam mirror can record the speed, direction, and path of the car.
Hold Live Events
The rearview mirror camera assists you in capturing all videos and ensures the authenticity of your recordings.
WOLFBOX Drive on. Always on.
 Rear View Mirror Camera |  WIFI G840H Mirror DashCam |  3 Channel Mirror Dash Cam |  4k 10" Mirror Dash Cam |  4k Mirror Dash Cam |  3 channel i07 dash cam |  New 2 channel Dash Cam | |
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Customer Reviews
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10,479
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1,480
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111
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503
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1,740
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679
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109
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Price
| $101.99 | $159.99 | $299.99 | $119.99 | $149.99 | $119.99 | $169.98 |
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Resolution
| 4K(F)+1080P(R) | 2.5K(F)+1080P(R) | 2K(F)+1080P(I)+1080P(R) | 4K(F)+1080P(R) | 4K(F)+1080P(R) | 4K(F)+1080P(I)+1080P(R) | 4K(F)+2.5K(I) |
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Screen Size
| 12'' | 12'' | 12'' | 10'' | 12'' | 3'' | 3'' |
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Capacity of the Free Card
| 32GB | 32GB | 64GB | 64GB | 64GB | 32GB | 64GB |
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Recommended Card
| 32G-256G,Class 10 | 32G-256G,Class 10 | 32G-256G,Class 10 | 32G-256G,Class 10 | 32G-256G,Class 10 | 32G-256G,Class 10 | 32G-256G,Class 10 |
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Special feature
| 4K(F) | Wi-Fi APP Control | 3 Channel mirror dash cam | Adjustable lens | 4K(F) | 3 channel dash cam | 5G WIFI |
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WIFI
| ✘ | ✔ | ✘ | ✘ | ✘ | ✔ | ✔ |
Videos
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Customer Review: It's not a mirror, but still neat.
Installer
Reviews with images
Basic features difficult to access/use
** Feel free to read my whole review, but I've just taken it down to one star because the system has completely stopped working. Sometimes I can get the screen on, but it doesn't recognize the memory card and won't record even if I can get it powered up, so... **Note: I include power consumption/current draw info at the end of my review.I wrote this review two hours ago as a three star. Then I went and tried to install the rear view camera. Now it's a two star review. I'll explain below.So, I'm six months into owning my dash cam. I like it, but it has recently caused me problems. The install of the basic camera was very simple, but I only plugged in the device/front cam itself, not the rear cameras or GPS. I really like having it, and have even provided video of a car hitting a motorcycle thanks to having this guy in my truck, BUT there are some problems.1) In the last month and a half the screen has started turning itself on while the truck is parked, which increases the power consumption considerably and has killed my new $250 battery several times already, and left me without the use of my truck several times. Not happy. I just had to go spend $55 on jumper cables to get my truck going today because I really needed to get across town and pick something up. This wasn't a problem the first 4.5 months of ownership, but now if I leave my truck sitting for a few days, it's dead. Totally dead. ** Update: during the colder seasons the screen would turn itself on almost constantly, within one to ten seconds of me pushing the button to turn it off, independent of if the vehicle is parked or driving **2) Many may wonder, why not use the power saving mode of parking monitor? Well, you have to buy a different accessory for that to work, item B081TY3H7T. It's a device that plugs into the fuse slots inside your fuse panel, grabbing one battery power source and one ignition switch powered source. Since nobody can tell me how this device communicates to the camera that the vehicle is off rather than just being a power adapter, and the product description itself doesn't even tell me what makes it any different than using the power source provided with the camera, then I'm not buying it. If I spend that $20 and the feature still doesn't work, then I'm just out another $20 and more time. I also don't want to increase the amount of wiring needed in the truck to make this product work. Parking mode seems like a feature that should have been build into the device functionality anyway, just like the GPS functionality should have been.3) The GPS feature fails, like all the time. About a third of the time the GPS shows as speed of 0 shown in red text, as you can see in the pictures ** update, the gps function fails almost all the time now, working only about 5% of the time **. The second photo you can see my speedometer not at zero, but the camera has the red error rather than an actual vehicle speed. So, if I get a ticket there's a very high chance my speedometer feature won't be captured accurately on the camera so I cannot defend myself in court. Also, you have to mount an external GPS device to get any feedback of vehicle speed and direction, and to my understanding this also sets the power off feature so the camera knows when you park and doesn't run 24/7 with the vehicle off. Again, it is unclear if the GPS device or the $20 additional accessory from item 2 actually creates the power off functionality. This should be more clear. I also can't find any instructions online about how to orient the GPS unit, or if it needs to be mounted upside down, like some do.4) The rear view camera installation.... In concept, simple, right? Plug and play? Almost. The device does not have the ability to flip the rearview camera image, so you HAVE to mount the camera with the sticky base pointing up. No option otherwise. There are zero provisions for having to install the camera with the sticky side down, which is required for installation on a truck, because there's no body panel hanging over the truck bed to stick this thing to. There are two mounting brackets included, but they are poorly designed in the sense that you can't actually functionally use them. One is a two-piece design, hinged in the middle, and it could be used to mount the camera under a vertical panel of some kind, but you'd have to have the bracket at a 90 degree angle to do so, sticking out from the truck body, meaning the panel you're mounting to has a black metal square stuck to it just over the camera as well, all of which looks terrible and will likely vibrate loose. They could have designed the bracket to be hidden behind the camera, but the mounting screw tabs on the bracket define exactly how you have to use it. The other single piece bracket is like that, hidden behind the camera, but the mounting screw tabs are too close to the flat portion of the bracket, so the cord coming out of the back of the camera pushes the camera up, making the view from the cameras perspective not useful. Additionally, the included cable for the camera/backup light is 20 ft long, but it's not long enough to reach the rear bumper on my truck (2001 silverado extended cab). If you plan to route the cable under the trim and around the cab to do a proper installation, the cable is about 15 feet too short. 33 ft extension cable is B082RZNJFY, $15, and the 50 ft extension cable is B0814ZHHST, $17. All of this to say, I have to find a way to make a custom mount for this to work on my truck. The only place I can see that will actually work and look halfway decent is if I actually screw one of these brackets into my tailgate handle so I can hang the camera below it, giving up about a 1/3 of my tailgate handle, looking ridiculous, and having to route this cable through the moving action of my tailgate hinges. Down to two star review because of this lack of design and functional quality. They offer the ability to mirror the image, just not flip it to mount the camera the other way. How ridiculous.5) The navigation of saved files is not intuitive, at all. You also cannot fast forward or rewind in a given video file, you have to watch it start to finish without interruption, so you'll want to make certain that your files are configured to be 1 minute long, not two or three. I set the cameras and GPS unit up on my bench to test the power consumption and even after giving the device time to recognize no movement, it did not power off and continued to consume as much power as it did before.6) The G-sensor, which is advertised as being built into the camera, doesn't seem very effective. I set the camera on a washing machine and jolted the machine pretty aggressively without getting a response from the camera or any notification. I'm not sure what the parameters are for this feature to work, but the GPS unit was plugged in as well, and the camera had been sitting idle for several minutes with the screen off.7) With a 32GB card and just using the single front camera set to 1080P, you only get about five hours of record time. That may seem like a lot, but think about if your camera runs while your vehicle is off, or you forget to save the file after an accident, or you hit the lock button, but the file with the recorded incident actually had just ended before you pushed the button, but you didn't know that until more than five hours later and now the file is overwritten? All of these have happened in my time using this camera. I had someone break into my shed and steal my generator while the truck cam was pointing that direction, but it was overwritten before I woke up the next morning. I would suggest getting a larger card, or a camera that actually works in parking mode or motion detection mode (if your future camera has this feature). Parking mode does not work on this product.The good:Screen resolution is pretty good.Audio is pretty good.The ability to review on the screen is handy, though honestly it would be easier to use and navigate if it paired with your phone like some other dash cams on the market.The bad:Aside from being a simple camera and microphone setup it fails in literally every single feature. Every one of them.Power consumption from 13.5v power supply:Unable to test in powered down mode or parking mode, because I can't get them to work -Front cam only, no GPS, screen off - 185 mAFront cam only, no GPS, screen on bright/dim - 405 mA/268 mAFront cam only, GPS plugged in, screen off - 200 mAFront cam only, GPS plugged in, screen on bright/dim - 435 mA/285 mABoth cams, no GPS, screen off - 305 mABoth cams, no GPS, screen on bright/dim - 550 mA/400 mABoth cams, GPS plugged in, screen off - 325 mABoth cams, GPS plugged in, screen on bright/dim - 640 mA/450 mA
Top reviews from the United States
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Reviewed in the United States on March 26, 2020
Reviewed in the United States on April 30, 2024
Reviewed in the United States on February 18, 2023
As indicated in the headline, this was installed in a 1998 Ford Ranger.
The installation was fairly straight forward and I was able to use existing grommets in the firewall and floorboard to exit the cab of the truck and run the wires to their destinations. The included 20-foot camera cable was just about the perfect length for my truck.
The camera quality is great, I can easily make out the license plate information on vehicles that are captured in the video and images. The night vision is clear and easy to see. A caveat to the night vision is glare from headlights - headlights both oncoming and rear-approaching provide a significant amount of glare, enough to obfuscate the view and prevent making out finer details. I'm not sure a whole lot can be improved upon this, though.
The included mirror/display easily attached to my existing rear view with a couple of elastic/rubber mounting bands and was quick and easy.
The reverse mode is great, and gives clearly visible parking lines, which are customizable in the settings of the device. I thought that this feature to customize the width and depth of the reversing lines was extremely well thought out.
The device boots up quickly, and is running within a few seconds of turning it on. The power draw seems minimal and if I forget to turn it off, it hasn't drained my battery yet (this can be prevented with a hardwire kit sold as an accessory for this device).
My principal caveat is that the GPS is pretty inconsistent. I have the puck mounted in the window and there doesn't seem to be any rhyme or reason as to when the device is going to pick up adequate signal. Sometimes it works when it's cloudy, sometimes it doesn't. Sometimes it works when it's clear skies, sometimes it doesn't. I have found that if I toggle to video playback mode, then back to recording, the GPS generally comes to life. Rebooting, disconnecting the puck and reconnecting, all of the normal tricks and tips aren't nearly as reliable as toggling between playback and recording.
The installation was fairly straight forward and I was able to use existing grommets in the firewall and floorboard to exit the cab of the truck and run the wires to their destinations. The included 20-foot camera cable was just about the perfect length for my truck.
The camera quality is great, I can easily make out the license plate information on vehicles that are captured in the video and images. The night vision is clear and easy to see. A caveat to the night vision is glare from headlights - headlights both oncoming and rear-approaching provide a significant amount of glare, enough to obfuscate the view and prevent making out finer details. I'm not sure a whole lot can be improved upon this, though.
The included mirror/display easily attached to my existing rear view with a couple of elastic/rubber mounting bands and was quick and easy.
The reverse mode is great, and gives clearly visible parking lines, which are customizable in the settings of the device. I thought that this feature to customize the width and depth of the reversing lines was extremely well thought out.
The device boots up quickly, and is running within a few seconds of turning it on. The power draw seems minimal and if I forget to turn it off, it hasn't drained my battery yet (this can be prevented with a hardwire kit sold as an accessory for this device).
My principal caveat is that the GPS is pretty inconsistent. I have the puck mounted in the window and there doesn't seem to be any rhyme or reason as to when the device is going to pick up adequate signal. Sometimes it works when it's cloudy, sometimes it doesn't. Sometimes it works when it's clear skies, sometimes it doesn't. I have found that if I toggle to video playback mode, then back to recording, the GPS generally comes to life. Rebooting, disconnecting the puck and reconnecting, all of the normal tricks and tips aren't nearly as reliable as toggling between playback and recording.
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Top reviews from other countries
Robert Bushby
For the price - This one is great, but not perfect, but really close!
Reviewed in Canada on November 16, 2021
Robert Bushby
Reviewed in Canada on November 16, 2021
Ok, so I bought this based on the reviews.
I originally gave it 3 stars, but upgraded it to 4 then 5, because of interactions with their service team, whom are very keen on making things right. I upgraded it again to 5 because their solutions and actions were great.
So, now that I have this all installed, I went out in the deep darkness for a test.
I thought that it works pretty good, but let me get into the details.
Cameras:
I found the original rear camera had a rather grainy image in the dark, but useable, I suppose I was expecting it to be a bit more of an eye into darkness than it turned out.
Am I disappointed?; well no not really, maybe some… but I did think it should be a bit better than it is.
Graininess shouldn’t be affected even considering it was installed inside the rear hatch window. The forward image is great and it’s behind a window…
So The next day it was sunny and I went for another drive. So now i find some new issues:
When driving with the sun out, looking at the rear image, there is a lot of problem with reflections. I am guessing it’s because it’s mounted on the inside, oh well, for now that will have to do until I can figure out how to mount it outside in such a place that is useful, I may try adding a small black cardboard sun shade over the lens to see if that helps.
I don’t really want to mount it outside And offset from the hatch handle (the handle is right in the center) for several reasons, first being that I don’t want it staring straight into the guy behind me’s headlights and second I don’t want some punks walking by and seeing it dangling there and decide to damage it, rip it off or diddle with it. So inside it stays for now.
** Update **
Wolfbox customer service got in touch with me after they read my review and offered to ship me a new better model rear camera, it came very fast and now that it’s installed, i can say i like the rear image much better. Much less grainy.
Front camera:
I find the clarity and overall look and brightness are really great.
Software:
So when using the setup, I found a problem that bothers me. If you are dealing with the reflections and want to turn off the screen, and use it like a regular mirror, it stops recording if you are in the brightness mode.
If you put it on “screen off mode”, that issue is avoided, because it turns off the screen and keeps recording after it stays lit for 30sec, so ok… but it would be nicer to have an onscreen button that you could do that with because now if i’m driving at night and want it on, you have to go into settings and monkey around to get it back to being on all the time… grrrr And then of course the screen is really dark in mirror only mode which is very sad. The manuals descriptions of the modes is poor.
** Update **
Tech support said that “quick” touching the power button will also turn it off but allow for continuous recording in mirror only mode. Ok, that helps!
I love the touch screen, and the software is clean and easy to use minus the issues I mentioned with the screen off options.
I love how i only have to touch the screen like an iPad to move the image angle up or down.
Also, the file system seems very weird. After reviewing the files on my computer it seems that I can see all the files as expected, you can only review forward files while on the mirror, I can’t see any files for the rear camera on the mirror, only on the computer… not a deal breaker at all.
Device body and design:
Another issue I have is the very poor “thought” design of the cables where they connect to the unit… 3 different shapes and angles, you would think they would design it in such a way that they would all face the same direction and sit nicely side by side instead of all hap hazard… see pics. (i’ll get a better pic soon)
It would be nice if the PCB had the memory card to one side or the other rather than in-between the rear cam and gps wire connections. But not a deal breaker.
GPS and LDWS
I tried the gps gizmo and took it out - absolutely useless and distracting.
Supplied cables and lengths.
I have a 2013 grand caravan and I found the rear camera extension wire was “just” long enough, if i have to mount it down near the license plate it might not make it unless i routed it as a straight shot through the head liner rather than around the perimeter under the edges.
Also, The front power wire is just barely long enough and i mean barely it would be nice to see it 6 inches or more longer.
I originally bought a 10inch unit - and “that” was too small just incase you’re trying to figure out which one you need.
Security Features:
There is a consideration to make when you buy one of these you may need to know.
It has to do with the leaving the camera on 24/7 on a non keyed 12v outlet, I tested the unit after i installed it and it is drawing about 0.3amps, so if you have a 45 or so amp hour battery, the battery will be dead or unable to start the car in about 3 to 6 days, so if you don’t drive everyday - so as to recharge the battery, you might want to not bother with the security cam feature.
If you do, you should get the adapter kit that is suppose to prevent drawing the battery out completely, but again, if you don’t drive it everyday, that kit will only just cut off the battery so it doesn’t kill it, and you’ll still be not recording after maybe 4 - 6 days.
However! - just to be clear, all this draining on a 24/7 recording program, is going to hurt your battery long term, because draining a flooded lead acid battery to 75% every 3 - 6 days is not good for it.
You might want to get a heated LifepO4 lithium or at least an AGM battery rather than a basic lead acid flooded battery. But I am ranting here… this not the fault of the dash cam… you could buy your battery at costco and just replace it under warranty in 3 years if it gets weak.
Or, maybe getting a small dedicated additional battery that you hide somewhere for the camera to draw from, which your alternator charges maybe with an isolator switch to have while your driving, just saying.
That of course will likely have to be professionally installed to be useful. I just wouldn’t bother.
I am just going to use it in my keyed 12v outlet thanks, and for that it seems so far to be great. I find if i need security recording - i just switch the prong to my non keyed outlet for as long as i need it then i put it back.
**Update**
I received some info from tech support concerning the recording in off keyed mode, apparently they say that there is circuitry embedded that prevents it draining the battery past 12v. I knew I wasn’t going anywhere over the holidays, So I put the adapter into my non keyed outlet and after 3 days my battery was stone dead at 8.4v - yup had to get a jump to start it.
So I will leave it in the keyed adapter from now on, but regardless I still don’t like the idea of leaving any sort of parasitic device eating away at my battery even if I am charging it every day.
I know many of you are not electrically savvy and think that there is nothing to consider when making changes to your systems, that all is rosy and possible.
As I said; if you do use it in non keyed mode or with it running straight off the battery AND you tend to not drive everyday, you should have something other than a lead acid battery installed, and the additional kit that protects the battery because LONGTERM your going to shorten your batteries life and unless you drive everyday, you are going to drain out.
So overall - you can’t go wrong buying this unit! Support is great, and the product is well thought out for the most part. I may be a bit weird about protecting batteries, but that’s me. If you’re looking for a good dashcam mirror, this one is worth getting in my opinion.
my 2cents
Images in this review
Edoardo
Prodotto ottimo e ottimo servizio clienti
Reviewed in Italy on March 18, 2024
Edoardo
Reviewed in Italy on March 18, 2024
Images in this review
DL
WOLFBOX 12" 4K Rétroviseur Dash Merci au vendeur
Reviewed in France on February 22, 2024Mason
Hervorragende Dual-Dashcam mit vielen nützlichen Features!
Reviewed in Germany on September 5, 2023