4 stars, only because in the summer with the sun and heat it blocks and does not recognize the microSD. If it happens and you don't notice, it simply doesn't record anything. Other than that, it's honest for its job.

The camera is very good for the money you spend. Also, you can disable the SOS video so it will have the entire file you need in memory.

Let me start with the most important reason someone would choose this specific camera, the image quality. Without exaggeration, it has excellent image quality, clear, distinct, with accurate colors, and the HDR is indeed real HDR and not some fake effect that many other cameras claim to have. You can easily distinguish signs and details at a distance that with other cameras you can only dream of. If I had to describe the image in a few words, I would say it easily outperforms many Gopro models, especially the older ones! Even at night in a rural area with no other lighting except for the car's headlights, the noise is minimal and visibility at a relative distance is ample, while, for example, in tunnel exits, the HDR does an excellent job, and just before you exit the tunnel, you can still see some faint details outside in the sunlight, while all the other cameras I have seen and tested simply "burn" the shot, displaying a blinding white glare. The work that 70Mai has done on the algorithm with the video resolution is truly exceptional; I didn't expect this from a dashcam! The image is very wide-angle, comfortably covering the entire windshield and the pillars, while the angle can be easily adjusted since the lens moves accordingly. The camera's Wi-Fi is quite fast (at least compared to other dashcam Wi-Fi I have tested) and transfers a "SOS" file of about 120MB to the phone in roughly a minute. Also, in the accessories, there is a simple hardwire kit (to enable parking mode) and a hardwire kit with a 4G adapter (to insert a SIM card and view the camera in real-time on your phone while also tracking GPS location) and a Polarized filter to eliminate reflections on the glass from the sun and greatly improve the camera's clarity. What I appreciated the most and truly tipped my hat to the camera is that at night, signs are clearly visible even on moving cars! I have no idea how they achieved this; I have never seen any other camera do this. I suspect that due to HDR, the camera takes two shots with different exposure times, one normal and one very quick and dark to capture details, and then combines these two shots into one (this is also the principle of real HDR operation).

And here the positives end!

The construction is made of black matte plastic that, due to its shape and material, is permanently exposed to the sun behind the windshield with no way to reduce the temperature; other cameras, for example, use metal in the camera body (many models from Nextbase do this, for example) or the body is positioned a bit further back in relation to the lens to "hide" from the car's roof and only expose the lens close to the glass and under the sun, but not this one! This camera feels like a small radiator if you touch it; in the summer month with a parked car and the camera off, I measured it with an infrared thermometer reaching 63 degrees Celsius! You might ask, is this so bad? Yes! Because the wise Chinese have put a regular lithium battery inside instead of a capacitor, resulting in: 1. the battery being a fire hazard due to temperature, 2. the lifespan prediction for the battery (and the camera) being extremely limited.
So this camera is normally intended for more northern countries, which have fewer heatwaves and temperatures, and not Mediterranean countries, unless you cover the car with a cover every time, in which case you automatically forget about the parking mode because simply the camera won't see what's happening around the car.

The screen is not touch, but the camera actually has buttons, which is good (in my opinion). Basically, anything inside the car cabin that is not touch and has buttons to operate it is good because it doesn't distract you from driving and you can press it by feel (I'm not saying this, all committees and organizations for road safety say it, but car manufacturers ignore it). However, the problem here with the buttons is that if the screen is off, to save a video, it’s not enough to press the "SOS" button once; you first have to press any button to turn on the screen, wait a second for the menu next to each button to appear, and THEN press the "SOS" button. The simplest function of dashcams has been turned into a science by the Chinese...

The rear camera is simply tragically terrible. The colors are washed out, the contrast nonexistent, the resolution (even though it's 1080p) looks like interpolated 720p while noise is present everywhere and always, license plates can only be distinguished at very short distances, and at night the videos are simply decorative. The image resembles a mobile phone from 2008.

In front, despite the extremely good image quality, the technical specifications of the video are also tragically terrible. At 70mai, they claim that their super camera records at an incredible and amazing 25 frames per second! Indeed, the produced video files are H.265 at 31000kbps and 25fps. OK, other 4K cameras record at 30 and 60fps, but with such quality in the image, you might say somewhere it has to fall short. Only the camera actually doesn't record even at 25fps but somewhere around 21-22fps! Opening the original video and going frame by frame, there are some frames that are duplicated and repeated; the camera places them together to fill the number 25 every second and thus save the video. You can see this and searching for video reviews of the camera on YouTube shows that the motion of the video, especially far right and far left, is not fluid at all but is "jerky." This happens because the actual video is 21-22 frames, and the camera inserts duplicate frames so that the marketing department of 70Mai can claim that their video is 25fps! And of course, almost no review mentions this for obvious reasons!

Searching for a solution to the above problem, I disabled HDR, changed the video compression from "High quality" to normal, fiddled with various others without result. What worked was changing the refresh rate from 60Hz (NTSK) to 50Hz (PAL) and finally the camera recorded at 25fps. I can't understand why 50Hz isn't the default setting since the camera doesn't work properly! The useless information I discovered was that if I disconnect the rear camera, magically the camera recorded at 30fps! Obviously, the rear camera is 25fps, and to make the front one keep up with the potato that accompanies it in the box, it necessarily records at 25fps too! This is what you call burying a product by the manufacturer!

You will tell me OK, no one intends to shoot a movie with a dashcam and all they care about is the image quality and the distant details being clear.
I will agree!
And here lies the biggest failure of this particular camera and the reason for my rating:
The "SOS" videos that the camera will automatically save in case of an accident.
All Dashcams, when we press the "SOS" button, save the previous 10-15 seconds and the next 30-60, the same happens when they detect a collision on their own.
This camera saves the previous... two (2) seconds and the next 30!
Which means that whether we press the button ourselves or it activates automatically due to a collision, we will NOT have a video of what happened before the collision, a stop sign violation, a behavior that led to an accident, etc.
We must be in a position (alive, standing, and with access to the camera) to search the memory for the normal videos of the camera and copy the relevant video before it is automatically deleted by the camera.
Of course, even in the above simple copying of the "SOS" video, 70mai managed to put obstacles there too!
The normal "simple" videos can be 1, 2, or 3 minutes long, but when we press the "SOS" button, the normal video, regardless of what point it has reached, gets cut off, and from there on the "SOS" video of 30 seconds starts.
So to keep/save the relevant video as well as what preceded it, we need to find in the "SOS" folder the video where we pressed the button and then in the "normal" folder (which contains dozens or even hundreds of videos) the video that was recorded before we pressed the button!
With all this process, it goes without saying that the video of a collision will be "cut" into two different files, the one that preceded and the one that was saved, and we will need to merge them into one file if we want to use them.
And of course, all this is the process only for the front camera; for the rear one, we have to do all the above from the beginning!

I have never seen such a monumental failure in a dashcam!
It really gives the impression that at 70mai either they have never driven or this is the first car camera anyone has ever made!
If I hadn't managed to run the wires inside the car and if the image quality, especially the clarity of the license plates, wasn't really that good, I would have packed it up and sent it back for a refund.
The image quality is the only reason for the two stars; if it weren't for that, it wouldn't even be worth the one that is the minimum.

In short, for entertainment purposes, it might be the best camera in its price category!
For safety reasons, however, it’s a bust!

Update March 2025:
After a firmware update, it started not saving all the SOS videos even though the screen shows an indication and makes a sound that it is doing so, depending on how it feels each time.
Also, several times, while the rear camera works normally and the video appears on the screen, it doesn't record any video at all; the folder inside the card is empty or has only half the videos it should have.
If I turn it off 1-2 times and turn it back on, it might record again.
Stay away; I no longer recommend it as a camera to anyone, not even at the extortionate prices I saw 300€+, nor for the 148€ I paid, and not even if it reaches 48€, don’t buy it!
The Chinese hardware is good, but the software and support are tragically awful. If you are looking for a camera, check reviews and find another with a similar sensor (Sony Starvis 2 IMX678) that works normally and reliably, stay away from this one, it is a waste of money and at a critical moment you might not even have any video saved!