70mai 4K T800 Dash Cam review: superior shooting from three angles

70mai 4K T800 Dash Cam review in a sentence: a comprehensive surveillance solution that covers all bases.

Fans of aftermarket automotive products will know of SEMA, held annually in Las Vegas. It’s a trade show dedicated to showcasing just about every car or truck accessory, including dash cams. One of the biggest names present this year was 70mai, which is where I got to take a deep dive into the 70mai 4K T800 Dash Cam. I’ve since been using the bundle edition in my own car, and it’s been a revelation.

This model is aimed at anyone who wants more complete coverage because the bundle I’ve been trying boasts no less than three different cameras. The 70mai 4K T800 Dash Cam is therefore a premium solution that sits up there alongside the best dash cams on the market. It’s got the trio of cameras, but it also has a beefy technical specification, plus oodles of features and functions. Better still, the 70mai 4K T800 Dash Cam is a doddle to set up and use.

There are other bundle options out there, of course, so check out our best front and rear dash cams selection. In the meantime, here’s how I’ve been getting on with the 70mai 4K T800 Dash Cam.

(First reviewed November 2025)

How much is the 70mai 4K T800 Dash Cam?

The 70mai 4K T800 Dash Cam is out now and can be purchased from the likes of Amazon in the USA. There are a few model variants, so the single camera model costs $399, the bundle sells for $340 and there’s also a bumper package that arrives with a battery pack too, which is $528. The product I’ve been testing is available through Amazon in the UK and costs £450, though keep an eye out for discounts. All products can also be purchased from the 70mai website.

Design and build

It’s easy to tell that the 70mai 4K T800 Dash Cam bundle means business. The main camera unit, which contains both the front-facing lens along with the inward-facing cockpit camera, features a reasonably chunky body that has more of a landscape-oriented design. This means it’s a good choice for less spacious windshields, as opposed to those long portrait-style models that tend to hang down into the screen area.

I found it was easy to mount thanks to both a supplied static sheet, that the adhesive pad can be attached to, and a sloped mounting bracket. The other great thing about this model is the way the barrel of the lens sits in a movable mount, so that it’s easy to get the angle just right for a perfect view of the cabin area. The same goes for the rearward-facing camera, which has a lens in a barrel-type of design. This can also be swiveled to get the shooting angle right given that every vehicle has a rear screen set at a different angle.

Setting up the cameras, and indeed picking through the installation and configuration steps can be done using the 3-inch IPS display. This is on the rear of the main camera unit and the 640 x 360 resolution is more than good enough for checking out the view from the cameras once they’ve been plumbed in. The layout is smart too, with a picture-in-picture arrangement showing the view from all the lenses, but on one screen.

Underneath the screen there are four control buttons for selecting the various configuration options. A microSD card slot and illuminated circular light to show when the unit is operating round out the rest of the design points of interest. Cable connections are easy to figure out too, with plug-and-play simplicity meaning there’s not much need to consult the manual, although it’s in the box if required.

Features and functions

The 70mai 4K T800 Dash Cam packs a specification that means it’ll be ideally suited to anyone who wants full coverage and great quality video. This is because both cameras pack Sony IMX678 Starvis sensors that deliver 3840 x 2160p 4K video at 30 frames per second and offer a very decent 146-degree field of view. For shooting inside the cockpit, the other lens offers 1920 x 1080p footage and this means all bases are covered in terms of what the cameras can capture.

Being a package that accumulates lots of larger 4K files, the Wi-Fi 6 capability offers 5GHz file transfers, which can be done with the help of the very good 70mai app. There’s also the ability to store up to 512GB on-board, with the detachable microSD card. An added benefit in terms of power is that this model works using a supercapacitor design that gives it a little more versatility than a unit with a conventional battery inside.

The 70mai 4K T800 Dash Cam will shoot footage quite happily all day, but this model also has an impressive after-dark specification that has been designed to tackle less than ideal situations. 70mai’s own Lumi Vision feature is aimed at capturing footage in gloomy conditions, while the nighttime feature called ‘Night Owl Vision’ helps deliver crisper more legible footage during the hours of darkness. Another feature, MaiColor Vivid+ Solution technology, is included and improves exposure that can often be hindered when shooting through windshields.

Naturally, the 70mai 4K T800 Dash Cam comes with added extras if you’re prepared to hardwire the unit into your vehicle. While this isn’t going to suit everyone, hence the ability to plug-and-play via a standard 12V port, the optional hardwire route offers a host of extra features. These include Buffered Emergency Recording, which captures events before, during and after an incident. Plus, there is Smart Parking Guardian Mode, which keeps tabs on your vehicle while it’s parked up at night, offering additional 24/7 security. The hardwire kit is a paid for extra though and might be best done by an expert if you’re not great with electrical tasks.

How does the 70mai 4K T800 Dash Cam perform?

I’ve used 70mai products before and always found them to be dependable. The 70mai 4K T800 Dash Cam is no different. It was easy to set up and configure, with the app being the main go-to option once past the initial steps in the car. The rear screen was useful for getting the shooting angles positioned correctly, but from there on in, it’s the app (for iOS and Android) that delivers all of the really good stuff. I was able to manage files and general functionality using that without any hassle at all.

In terms of shooting quality, I found the 70mai 4K T800 Dash Cam to be very consistent, with a good level of responsiveness when it came to recording important moments. Perhaps the best aspect is the way the unit can pull in all of the footage from the three different lenses and present it on the screen, or the app. The lenses end up giving an extensive view from all angles, with the cockpit footage being just as good as that from the outward-facing lenses. There’s all the journey information presented within the footage too, thanks to the GPS, so that means time, date and speed in case of any incidents.

The footage gathered is divided into different folders, so it’s easy to pick through and find a specific clip and from any angle if the need arises. Again, it’s the app that helps best with this task, although some management can be carried out on the dinky rear screen. I thought the Sony Starvis 2 sensors performed admirably, both in harsh daylight conditions as well as on gloomy winter days and after dark. The definition of road signs and license plates adds another level of reassurance if any evidence is needed following an incident. Overall, there was little if anything I could find from the footage to complain about.

Should I buy the 70mai 4K T800 Dash Cam?

The 70mai 4K T800 Dash Cam is the perfect proposition for anyone needing a more comprehensive overview of their surroundings. Accidents and incidents can happen from all angles, so the trio of lenses keeping tabs on vehicle movements in this bundle will make a lot of sense for some.

The video quality from all of the cameras is excellent, while the features and functions make the 70mai 4K T800 Dash Cam a powerful surveillance solution. That pushes the price up a little, but a good quality dash cam set can pay dividends when dealing with insurance companies in the unfortunate event of an accident, so it could be money well spent.

Also consider

If you're looking to save a little money, then you can check out our best cheap dash cam deals page, and if you're looking for some top options, check out our best dash cam guide.