70mai 4K T800 Premium Set - 3 Channel Dashcam - Dual 4K Sony Starvis 2 IMX678 - Unboxing & First Impressions Europe

[Julian23]

After testing the 70mai Omni 4K (X800) extensively, I'm onto the next 70mai dashcam.
Big thanks to 70mai for the opportunity to test their new flagship again!
Other than the Omni 4K, this is a triple-channel setup. The T800 is their latest high-end dashcam and their first to offer dual 4K channels: both the front and rear cameras record at 3840×2160, powered by Sony STARVIS 2 IMX678 sensors. That’s already a major leap compared to most rear cams, which still stick to 1080p or 2K.
The interior camera adds full infrared night vision using four 940 nm IR LEDs, making it ideal for ride-share drivers or anyone needing reliable cabin footage at night. All three channels support HDR (High Dynamic Range), and the main unit uses a super-capacitor instead of a lithium battery, making it far more heat-resistant. Perfect for parking mode and summer use.
On the connectivity side, the T800 includes Wi-Fi 6 for fast downloads and a smooth live view in the app. The GPS module is included in the housing, and you get full ADAS support (lane departure warning, forward collision, pedestrian alert) as well as optional 4G cloud support for live streaming, GPS tracking, and cloud alerts. The T800 does support the UP04 or UP05 4G module for cloud features. The camera can be remotely monitored, settings can be changed and more.
There are two versions of the T800 available: the HDR Set and the Premium Set. This review focuses on the Premium Set, which includes the RC41 rear cam with the same IMX678 sensor as the front. The HDR Set, on the other hand, uses a 1080p-only RC24 (IMX662) but allows 4K60 recording in single-channel mode. In triple-channel operation (Premium Set), frame rates are 4K30 front, 4K30 rear, and 1080p30 interior.

Specs (Premium Set):

• Front Camera: 3840×2160 (4K) @30fps, Sony STARVIS 2 IMX678, F1.7 aperture, 146° FOV
• Rear Camera: 3840×2160 (4K) @30fps, Sony STARVIS 2 IMX678, 146° FOV
• Cabin Camera: 1920×1080 (1080p) @30fps, 4× 940 nm IR LEDs, 147° FOV, 45° tilt up/down
• HDR: Enabled on all channels
• Display: 3.0" IPS LCD (non-touch), with physical buttons
• Storage: microSD up to 512 GB (U3 required)
• Connectivity: Built-in GPS, Wi-Fi 6, optional 4G cloud via UP04/UP05
• ADAS: (LDWS, FCWS, PCWS),
• Parking mode: Time-Lapse, Motion Detection, Collision Detection

Unboxing:

The box itself

The manual and SD card are in a cardboard box.

The cameras and both cables.

Both cameras

 

[Julian23]

Side view:

The display and interior camera

Real vents on the rear to keep the IMX678 cool enough.

The lens is centered in the middle

Setup screen explaining the buttons

Setup screen explaining the buttons

Normal recording

Once an emergency video has been triggered, an orange bar will appear at the bottom, indicating how long the event will be recorded.

First Impressions
The overall build quality of the 70mai T800 is excellent. The main unit feels solid and well put together, with no creaking or flimsy parts. The finish is matte and professional with high attention to detail. From the venting around the lens modules to the ring light around the power button, it shows that 70mai didn’t cut corners here. Everything feels thoughtfully engineered.
Unfortunately, there’s no CPL filter included at this time. It's not available yet, but it should be at some time in the future.
Testing will show how good 70mai has refined its firmware.

I’ll follow up soon with testing results, including image performance, plate capture, bitrate, etc.

 

[Julian23]

Reserved

 

[runtohell121]

Looking forward to it!

 

[haiou_f]

May I ask a question? The leftmost button on my T800 needs to be pressed with some force to respond, is that the same for yours

 

[Julian23]

May I ask a question? The leftmost button on my T800 needs to be pressed with some force to respond, is that the same for yours

I just checked my unit.
All buttons require the same force.

 

[Julian23]

My unit got delivered with the firmware 1.0.115ww.
After connecting to the camera, the app did notify me of a new firmware version.

 

[Index]

Parking mode: Buffered, Time-Lapse

Where did you get the information that the cam supports buffered parking mode? I can't read anything about it on the 70mai and kickstarter page.
There is only the information that it has a buffered emergency mode in driving mode. But that has nothing to do with parking mode.

 

[kamkar]

I did find today that as for manual event files, the camera save the entire file, by chance when i pressed the event button it was 20 or so seconds before the current 3 minute file ran out.
So have quite a bit of " buffer " in that particular situation.
Making me think if you time it so a new file have just started to record, you will have very few seconds of before footage.

Hence why SG systems back in the day saved 2 consecutive files, so in worst case ( 3 min segments ) you would have at least 1.5 minute from before event. ( saving current + next or previous depending on where you was in current file, first half of corrent and previous file would be saved too, more than half way in current file and current + next would be saved / locked )

 

[lisabon_Q3]

@kamkar
The logic of emergency recording is as follows:
If the start time of a normal video ≥10 s (from the moment of the collision) then the duration of the emergency video is: start time of this video is + 30 s;

If the start time of the video < 10 s (from the moment of the collision) then the duration of the emergency video is: previous full video + the start time of this video (1-10s) + 30 s

Therefore, you will always have at least 10 s of buffer time before pressing the button or hitting it.

 

[kamkar]

Yeah it is not a big deal really ( well for me )
I have always looked at event files as mere flags for when something happened, and i instead focus on having plenty large memory cards, so even in case of a minor thing, you can still merrily drive on and be assured all you will ever need is still there.
The SG way was only nice in that it always had all i would want to share in my little youtube uploads, even if i was slow to press the event button.
That is my primary thing against buffer systems, if you take more than 10 seconds to press the button, the event will not be in the event file, with SG you could pull over sigh - light a cigarette and then push the event button.

That approach might not work in large countries where you might drive very far, but in little Denmark where you can drive from one end to the other in like 4 hours it will be just fine.
My longest ever drive was from the Swedish / Finnish border and home to Denmark, that +1000 KM took the urge to drive anywhere away for a few days after that ( did it in one go )

 

[Julian23]

Here is a quick overview of the bitrates at which the T800 is recording.

• Front: 35010 kBit/s or 35,010 Mb/s (it can fluctuate down to 31,8Mb/s from the clips I checked)
• Rear: 28670 kBit/s or 28,670 Mb/s
• Interior: 12580 kBit/s or 12,580 Mb/s

While this isn't as high as other IMX678 dashcams, it's also not the lowest.
I haven't noticed any artifacts in the video while driving through a forest.
Seems like it's well balanced.

 

[Julian23]

A feature I really liked while scrolling through the settings is the live view from the rear camera when rotating or mirroring it.
No more guessing what it will look like.
It makes it so easy! Take notes, other manufacturers.

 

[Julian23]

Here are some daytime screenshots.

Different distances:

 

[Julian23]

-Deleted due to upload error on my side.

 

[Julian23]

The overall image quality is very good.
Plates are very easily identified at the front.
The rear can still read plates, but not as good as the front obviously.
The 4k in the rear is still noticeable and definitely has advantages over 2k.
Zooming in to a distance where there isn't much motion blur often reveals the plates.

Here is a random pic of a motorcycle. (rear camera)

 

[Julian23]

When in parking mode, the T800 needs 1-2 seconds to start recording after an impact.
10s-20s later, the notification will be received on the phone, and the video will upload or be uploaded to watch.
You will know pretty quickly if something has happened.

 

[Julian23]

Another positive thing to mention is the audio quality.
Many dashcams have issues with loud, low frequencies (bass).
The T800 handles this pretty well. The volume does get lower, but I was not able to hear ANY distortion.

 

[Index]

When in parking mode, the T800 needs 1-2 seconds to start recording after an impact.

So = There is no buffered parking mode. Recording does not start before the event, but only 1-2 seconds after the event. Buffered parking mode save moments before and after a detected event.

 

[Julian23]

So = There is no buffered parking mode. Recording does not start before the event, but only 1-2 seconds after the event. Buffered parking mode save moments before and after a detected event.

Yes correct. No recording before the event. Only 1-2s after.
Got it wrong from the datasheet.

If you run motion detection and collision detection, and it notices something in it's FOV, then it will be recorded again.