70mai 4K A810S (unboxing & first impressions) (Sony Starvis 2 IMX678, Starvis 2 IMX662, Wi-Fi 6/GPS, Novatek, 4K front, 1080p rear, HDR all channels)

[Augustus]

It's 2026, and we have the first release of the year for 70mai, the A810S. This is the follow-up to the highly successful A810 from a few years ago. Once again, we have the tried and true Starvis 2 IMX678 sensor on-board, with the main changes being an improved 1080p rear Starvis 2 sensor and the move to a supercapacitor from the previous model's battery. The rear sensor is the RC24 model featuring the Starvis 2 IMX662, a model shared with other models in 70mai's line-up. The front camera's aperture has also been improved from F1.8 to F1.7, and Wi-Fi 6 is now present from last model's Wi-Fi 4. New to the 4K A810S is the option of a new RC23 waterproof rear camera, which contains the same IMX662 sensor but can be mounted on the exterior of a vehicle.

Turning once again to the box contents, we have the two-tone finish with orange lettering that has been on other models such as the 4K M800. Upon opening the box we have the slick black packaging, with two separate envelopes containing the required materials. Contained within is instruction manuals, electrostatic stickers front and rear cameras, spare mounting adhesives, black plastic pry tool, 12V cigarette lighter (with additional USB-A port), and their respective power cablings.

First impressions are solid of the 4K A810S. The lenses of the front and rear cameras are adjustable via swivel, with a 3-inch IPS display (no touchscreen) taking up the majority of the real estate of the front camera. There are also multiple ventilation holes on both the front and rear camera sensors - with plenty of these holes available to dissipate the heat produced by the Starvis 2 sensors.

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 A810S was once again a straight-forward process, and so was it's integration with the 4G parking UP04 kit. Included firmware version was v1.1.26ww, out of the factory. Would like to extend my gratitude to 70mai once again for providing me with this opportunity to test-drive the 4K A810S. Over the coming weeks, I'll be sharing my detailed findings with you all - stay tuned for my full review coming soon here on DashCamTalk forum.




Some close-up photos of the 70mai 4K A810S:

 

[Augustus]

There has been a firmware update for the 70mai 4K A810S, taking it from version 1.1.26ww to 1.2.33ww. Changelog is:

- optimised SD card performance
- fixed other known issues

 

[Augustus]

Out-of-Box Experience (OOBE) for the 70mai 4K A810S:

Contained below are some photos of the setup process for the 70mai 4K A810S. I observe that there has been some changes to the setup process over older 70mai models, in now that more settings are able to be configured during the setup, without having to delve into the settings after the initial setup.

This is a good move by 70mai, and takes a lot of the hassle out of the process for the end user. There is also a prompt if the memory card you are using isn't suitable for the dash camera.

 

[Augustus]

There has been a firmware update for the 70mai 4K A810S, taking it from version 1.2.33ww to 1.5.40ww. Changelog is:

- optimised SD card performance
- fixed other known issues

 

[Augustus]

Bitrate Values, Wi-Fi transfer speeds and Resolution Settings for the 70mai 4K A810S:



Front camera (recorded in 2160p HEVC 30fps HDR): 29.4 Mb/s
Rear camera (recorded in 1080p HEVC 30fps HDR): 10.1Mb/s
(all recorded in two-channel configuration at maximum resolution settings)
Audio: AAC format recorded at 64kb/s at 16kHz resolution


Wi-Fi transfer speeds (using Wi-Fi 6 on the 2.4GHz band): 3.66MB/s, where file size for one-minute 4K clip is ~220MB. This is therefore not true Wi-Fi 6 transfer speeds, as there is the missing 5GHz band.

 

[Augustus]

Heat Testing: 70mai 4K A810S + 70mai UP04 4G Hardwire Kit

The 70mai 4K A810S on show here is recording at its highest native resolution of 4K, 30 frames per second in two-channel configuration. Please keep in mind that this is a tough test as this dashcam is exposed to operating conditions that stresses it to its limits. Firmware version: 1.5.40ww. Tested with it's respective stock power supply.

In all instances, the ambient car cabin temperatures (with air-conditioning set to lowest setting without car driver/passengers feeling hot) is 32.7 degrees Celsius. 70mai 4K A810S installed to left of rear-view mirror




3rd April 2026:

Scenario: parked in stationary car mid-afternoon for approximately 30 minutes directly facing sun
Exhibited behaviour: 70mai 4K A810S did not shut-down

Outside stated weather bureau temperature: 28.1 degrees Celsius
Dashboard recorded temperature: 53.5 degrees Celsius

70mai 4K A810S (top of camera above LCD on ventilation grilles row): 64.5 degrees Celsius
70mai 4K A810S (LCD screen itself): 70.1 degrees Celsius
70mai 4K A810S (underside of camera on ventilation grilles): 60.1 degrees Celsius
70mai 4K A810S (directly at microSD slot location on left side): 82.4 degrees Celsius

UP04 (directly at nano-SIM card slot location): 56.1 degrees Celsius
UP04 (underside of unit at 70mai logo location): 53.3 degrees Celsius

 

[Augustus]

The full review of the 70mai 4K A810S has now been published, you can read it here: https://dashcamtalk.com/forum/threa...-review-a-worthy-follow-up-to-the-a810.60966/

 

[Nagumich]

Wi-Fi transfer speeds (using Wi-Fi 6 on the 5GHz band):

A810S has WiFi6, but only 2,4GHz. 🙁

 

[Augustus]

A810S has WiFi6, but only 2,4GHz. 🙁

Well that explains it 🙁

 

[Augustus]

There has been some more updates to the 70mai APP in the Google Play Store:

70mai - Apps on Google Play

70mai App is a mobile phone software used with 70mai Smart Dash Cam.

play.google.com

The latest version is now 4.0.1 and brings the following improvements:

- redesigned and optimised device pages for some models
- added display of the server the user is located on
- added entry for customer service contact information
- fixed other known issues

 

[Augustus]

After testing A810 Lite, A810S, A800SE 4G - which one would I buy out of the range?

This is a question that I think many buyers would ponder when purchasing a dashcam in this particular 70mai product line.

All three have support for 70mai's own battery pack and 4G parking monitoring kits UP04/UP05.

However, the A810 Lite and A800SE 4G are both using the GalaxyCore GC8613 4K front sensor, while both having 1080p rear cameras. While the A810S uses the Starvis 2 IMX678 4K sensor. The other main difference is that both the A810 Lite and A800SE 4G don't possess motion detection, only collision detection.



Considering all the above points, I firmly believe that if a user wants the best in image quality or motion detection for 4G parking kits, then the A810S is your pick.

If you want the best value-for-money true 4K dash camera, then the A810 Lite is your pick.



The A800SE 4G is a very competent dashcam, but in my eyes I don't believe the added features over the A810 Lite aren't quite enough to justify the additional cost.