G840S 12" 4K Mirror Dash Cam Backup Camera, 5.8GHz WiFi Smart Rearview Mirror for Cars & Trucks, Front and Rear View Dual Cameras, Night Vision, Parking Assistance, Included 32GB Card & GPS

2 years on October 28th 2025. Product still working fine, never had any issues. Only on a rarely occasion that it does not switch on itself and I have to do it manually. Now I know, I keep an eye out each time. Awesome quality product. Easy to install, it comes with a small tool to tuck the wires behind the head liner and the plastics of the car. It did not take long and no need to pay for a third party to install. It came with everything you need. The only thing I needed extra was a few cable ties to tidy up the wires under the dash, otherwise, I am extremely happy with this purchases. Sometimes pictures paint a different picture on Amazon and some sellers are not honest. The company, Wolfbox_Store is one of the most honest I have dealt with, they promised a refund on another product I purchased to support hardwiring the mirror, and I bought it and they refunded the full amount once I showed proof that I did buy and Amazon confirmed it. Highly recommended product and Wolfbox is cool. Not to forget, their communication and customer service is outstanding, very clear and great support.

It’s big size I like it and very clear

The product was received as described. A 32GB Mini SD card included. Everything working as advertised and satisfied. Only thing not working is LDWS.

Outstanding product with best camera results. Car power charger was broken but customer service team they are very quick and return the charger amount to me. Haven't seen this quick and best service from anyone. No hassle in installation and its been 1 week and its working great.

Quality and easy to install. Not only for recording, useful for tinted cars specially when driving at night. Highly recommended.

It fitted well for my Land Cruiser I purchased the 12 inches display it’s perfect 👌, got it fitted with hardwired kit so took it to a professional to get it fixed but worth the price, clarity of both front and rear are super clear and best part is the camera angle can be controlled on the display easy and smooth. Happy with the wait and buy.

I got it installed by a professional technician but got very disappointed with the results comparing with the premium price paid. 1st of all, the rear view angle isn't wide enough to see an incoming vehicle when I'm reversing the car. In fact I can see the car when it is just 2-3 meters away. The rear view camera is mounted just next to the car's OEM camera. 2nd, the reversing lines never get saved with all the efforts and adjustments and do not move with the movement of vehicle. 3rd, the front view which is 4K is worst than the rear view which is 1080p. The screen glare is uncomfortable when driving at night. I will give it another try before return to see if rear view camera can be adjusted but as WolfBox sells a WDR camera separately I do not expect the camera it came with will provide a better wide coverage of rear view.

I like the overall product its ok and works as described.... don't like the power cable that as to be conected to the 12V of the car .... the brand sells a cable that can be used in the fuse box ...... that is the reason for the 3 stars

Whats a good start for a technology that will help me drive safely. Thanks.

The screen and touch responce is great. It has nice features. Front camera is pretty good but rearview is not as good after dark. Some pictures that are uploaded can be misleading and make you purchase a different model rather than what you want. More importantly, the customer support is phenomenal. They will fix any issue and make sure you are happy with the purchase and the brand. Happy to own a Wolfbox branded product.

La cámara de coche WOLFBOX 4K Dashcam es, sin duda, un dispositivo impresionante que ha superado mis expectativas en todos los sentidos. Como conductor preocupado por la seguridad, siempre he buscado una cámara de tablero confiable que pueda proporcionar pruebas claras en caso de un incidente en la carretera, y esta cámara lo hace con creces. En primer lugar, la calidad de video 4K es excepcional. Las imágenes son nítidas y detalladas, lo que facilita la identificación de matrículas u otros detalles importantes en las grabaciones. La pantalla táctil de 12 pulgadas es lo suficientemente grande como para ver claramente lo que está sucediendo y navegar por los menús de configuración de manera sencilla. La función de doble lente con ángulos de visión de 170° + 140° es una característica destacada. Captura un amplio campo de visión tanto en frente como en el interior del automóvil. Esto es especialmente útil si desea documentar lo que sucede dentro del automóvil o si tiene un vehículo de flota y necesita supervisar a los conductores. La visión nocturna también funciona sorprendentemente bien, lo que proporciona una calidad de video clara incluso en condiciones de poca luz. El G-Sensor es una característica vital en una cámara de tablero, ya que detecta automáticamente eventos de colisión y bloquea las grabaciones para evitar que se sobrescriban. Esto garantiza que siempre tenga evidencia de cualquier incidente. La función de grabación en bucle es práctica, ya que asegura que la tarjeta SD de 32 GB incluida nunca se llene por completo. Las grabaciones más antiguas se sobrescriben automáticamente, por lo que no es necesario preocuparse por la capacidad de almacenamiento. El monitor de estacionamiento es una ventaja adicional. Puede configurar la cámara para que grabe automáticamente cuando detecta movimiento o vibraciones mientras su automóvil está estacionado. Esto puede ser útil para proteger su vehículo en situaciones de estacionamiento. La instalación fue relativamente sencilla gracias al soporte de succión y el cableado incluido. Además, la cámara es lo suficientemente elegante como para no obstruir significativamente su visión mientras conduce. En resumen, la WOLFBOX 4K Dashcam es una inversión valiosa para su seguridad en la carretera. Ofrece una calidad de video excepcional, funciones avanzadas y una fácil instalación. Si está buscando una cámara de tablero confiable y de alta calidad, no puedo recomendar esta lo suficiente. Estoy muy satisfecho con mi compra y me siento mucho más seguro en la carretera con esta cámara a mi lado. ¡Una compra excelente! ⭐⭐⭐⭐⭐

Ik ben het Engels niet machtig zo kan mijn instellingen niet naar mijn keuze instellen

** Updated** 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