70mai 4K T800 (unboxing & impressions) (Sony Starvis 2 IMX678, GC2093, Wi-Fi 6/GPS, Novatek NT98530, 4K front / 4K rear / 1080p int, HDR all channels)

Augustus

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Viofo, Vantrue, 70mai, Wolfbox
A few months later, halfway through the year and now we are back with 70mai's latest release, the 4K T800. This is 70mai's flagship release for 2025, and builds upon the previous success of the 4K Omni by implementing a Starvis 2 IMX678 4K rear sensor! (in addition to the front 4K IMX678 of F1.7 aperture) and integrating a 1080p interior cabin camera into the main unit. All three channels record in HDR. There are two variants of the 4K T800, a normal "HDR Set" and a "Premium Set", which is on review here. The main difference between the two is that the Premium Set comes with the RC41 (IMX678) sensor, rather than using the 1080p-only RC24 (IMX662). 4K60fps is only enabled on the HDR Set; in three-channel mode on the Premium Set we have 4K30fps front, 4K30fps rear and 1080p30fps for the interior cabin camera. The fields of view are 146 degrees for the front camera, 146 for the rear, and 147 for the interior cabin camera. The main unit's physical dimensions are 46x63x123mm, and there is no battery on board, just a supercapacitor. The angle of adjustment for the interior cabin camera is 45 degrees up, and 45 degrees down.

Turning to the box contents, we once again have the svelte two-tone silver and black packaging of previous 70mai products, a nice look in itself. Upon opening the box we have an envelope containing the instruction manuals, electrostatic stickers for front and rear cameras, spare mounting adhesives, and a 512GB 70mai-branded microSD memory card. Under the envelope we have the front/interior and rear cameras, and an additional box which contains: black plastic pry tool, 12V cigarette lighter (with additional USB-A port), and respective power cabling for the front/interior and rear units.

First impressions are very positive of the 4K T800, even with it's form factor. The interior cabin camera is rotatable, and complements the 3-inch IPS display (no touchscreen) on the main unit, with physical buttons contained underneath. When it comes to the interior camera, it is equipped with four 940nm wavelength infrared lights. We also have multiple ventilation holes on the main unit, and this year, on the rear unit itself. These are more than adequate as the Starvis 2 4K sensors are known to be quite the heat generators. Everything screams premium about the design of the 4K T800, as they could have called it a day, but 70mai has taken initiative in adding ridges and grooves to the unit sides and lens casings. A green indicator light also adorns the power button on the left side of the main unit.

Features from previous 70mai models also make a welcome return here. Buffered emergency parking mode, Lumi Vision for parking mode to brighten very dimly-lit scenarios, time-lapse recording and battery voltage monitoring all make a return, along with support for their existing 4G parking surveillance kits, UP04/UP05.

Installation of the 4K T800 was once again a breezy affair, and so was it's integration with the 4G parking UP04 kit. Included firmware version was v1.0.115ww with a build date of May 19, 2025.

Would like to extend my gratitude to 70mai once again for giving me the opportunity to road-test their best of the best. And a special thank you to 70mai's mascot, MaiX for accompanying my hands-on photos of the 4K T800. Stay tuned for my findings and review, coming soon here on DashCamTalk.




Some close-up photos of the 70mai 4K T800 dashcam:

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Power Consumption, microSD memory card testing and Day One firmware update for the 70mai 4K T800:

The 70mai 4K T800 uses the existing Midrive CC02 cigarette lighter power adapter, which has been used on previous 70mai models, most recently the 4K Omni. Also of note is the thicker than normal USB-C to USB-C power cable for the rear camera RC41 sensor with the 4K T800 package (see photos). Power consumption hovers around the ~9-10W mark, with operating temperatures being quite reasonable too at around 28 degrees Celsius.

When testing the 70mai-branded microSD memory card, which can write and read at very respectable speeds of 85MB/s and 96MB/s. The maximum microSD memory card support for the 70mai 4K T800 is 512GB, which is in deficiency to some of it's competitors which offer support of up to 1TB capacity microSD cards.

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Upon connecting the 70mai 4K T800 to the 70mai Android APP, I was prompted for a firmware update to v1.0.118ww with a build date of May 26, 2025. The rear camera firmware version is 0.1.10. Changelog states: fixed known issues. Much like has been the case with the 4K Omni, I would expect a raft of firmware updates in the coming months to smooth out, and add some exciting new features to the 4K T800.

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Ring Indicator Light and Power Button Functions for 70mai 4K T800:

The 4K T800 has a ring indicator light around it's power button, which is located on the left-hand side of the main unit. Solid blue comes on briefly when the unit is powering on, when recording commences, it changes to a solid green. The blue light also blinks when formatting the memory card, performing a factory reset, performing a firmware update, accessing the photo/video album and during initial setup.

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The power button also functions as follows:

- tap to turn display on/off
- press and hold for a few seconds to turn the main unit on/off
- double-click to record emergency video
 
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A curated selection of screenshots from the 70mai APP itself. As you can see, there is quite a plethora of options available to the end user of the 4K T800. I have tried to include only the major differing and new changes from the 4K Omni in these screenshots. Kudos to 70mai for always including a high level of customisability for their dashcams.

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Photosensitive sensor of the 70mai 4K T800:

There is a new blue-coloured photosensitive sensor contained on the underside of the main unit of the 4K T800. I presume this serves the function of being an ambient light sensor for the display of the dashcam, as well as a trigger for the infrared lights to turn on for the interior cabin camera. This is always a welcome addition, especially in sunny conditions.

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Thanks mate, watching this thread. Eager to hear your thoughts on how it performs.
 
Thanks mate, watching this thread. Eager to hear your thoughts on how it performs.
No worries thanks for tagging along mate, I have high hopes cos their last model, the 4K Omni, I'm a big fan of.

70mai has been improving in leaps and bounds over the past year so I'm excited to see where they head next
 
I don't suppose they will have a 2CH version without the cabin camera?
 
I just want plain Front & Rear, without a cabin camera on the side of the main unit.

The shape would suggest no to not having the cabin camera in its current design. The cabin can be switched off though.
 
Nice photos Augustus, I look forward to what you and Paul have to write about this dash cam. I wish 70Mai had a telephoto with this T800, cats meow if they did. 🙂
 
Nice photos Augustus, I look forward to what you and Paul have to write about this dash cam. I wish 70Mai had a telephoto with this T800, cats meow if they did. 🙂
Thanks mate, telephoto is the next step I think in terms of the competitive landscape. I do love it when the competition makes everyone else work even better and we as consumers win
 
I wish 70Mai had a telephoto with this T800, cats meow if they did.
I wish they could replace the interior-facing cabin cam with a front-facing telephoto - in the same body style

Oh, and upgrade it to 2.5K from 1080p, please
 
I wish they could replace the interior-facing cabin cam with a front-facing telephoto - in the same body style

Oh, and upgrade it to 2.5K from 1080p, please
Think we all wish for that, but I wonder how it would go bitrate-wise. With the A329S/T/WW, Viofo shows that there is headroom with the bitrate but at what cost. Heat and reliability are always a concern, so while 70mai might not win on paper with bitrate I do think their approach is more sensible, without their bitrate dropping too low to cripple the video quality.

Then again, Viofo running high quality at high bitrate is part of what makes them so appealing to me, and the Telephoto is the cherry on top. Gah, so many great players in the dashcam space!
 
Looking forward to your review. I don't understand why the indicator light on the left side of the T800 cannot be turned off. It's a bit too conspicuous at night。
 
How easy is it to save a file manually whilst driving? I don't see an obvious button.

On the A810 I believe it was the second button from the left? Or is it easier to shout at the dashcam these days?
 
"Record Video."

Voice command.
 
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