Author's Note: The full review can be found here. My review blog for my other reviews: jwtechreviews.com

Here’s the B4K from Blueskysea.





Technical Specs:
• Processor: Novatek 966670
• Sensor: front cam: Sony IMX415 8MP sensor for front Cam; rear cam: GC2053 2MP sensor
• Viewing angle: Front: 120º F1.6; Rear: 140º wide viewing angle
• Resolution: front only: 3840×2160 30fps; dual mode: front – 3840×2160 24fps; rear – 1920 x 1080 24fps
• Support up to 256GB microSD card
• Built-in GPS
• Built-in Wi-Fi
• Built-in supercapacitor
• 3.16” IPS Screen
• Motion, Time-lapse, and buffered parking mode
• Video codec: H.265 HEVC
• Video format: TS



The box





Open box




Contents

• B4K
• GPS mount
• USB car charger
• Rear cam
• Rear cam cable
• User manual



B4K






GPS mount






USB car charger





Rear cam






Rear cam cable




User manual









Optional accessories

B4K CPL filter




Contents

• B4K CPL filter
• Wipes
• Manual



B4K CPL filter






Wipes




Manual




B4K hardwire kit

This is the newer hardwire kit for the B4K with the Parking Guard Mode Signal switch



Contents

• B4K hardwire kit
• Fuse taps
• Manual



B4K hardwire kit






Fuse taps





Manual




Initial firmware out of the box

The initial firmware is B4K V008. Updated to the latest B4K V009 firmware.



Test setup

Using a 128GB Samsung Evo Plus microSD for the recordings.



Ucam app







Videos
Front cam recorded in H.265 3840×2160 24fps with an overall bit rate of 27.0 Mb/s using the CPL filter.










Rear cam recorded in H.265 1920×1080 24fps with an overall bit rate of 6,288 kb/s.











Final thoughts
The B4K is one of the best affordable true 4K dashcams out there and it’s using a supercapacitor.

The B4K’s front cam has great daytime and nighttime in true 4K. The rear cam is ok during the daytime but not so great during the nighttime with some pink glow at the edge of the video.

But when used with the rear cam, both cams record in 24fps instead of 30fps. Could be a limitation of the Novatek 966670 chip as the Sony IMX415 sensor is a true 4K sensor maybe.

Didn’t managed to test the parking mode as I have a few dashcams connected.

Hopefully, Blueskysea will improve with a better rear cam and able to record in 30fps when in dual dashcam mode.


Where to buy: Lazada

This post has been edited by blurjoey: May 8 2021, 06:33 PM

Think your beam light height is a tad high.. Where to buy cpl filter & will fuse tap void warranty? Nice review!

This post has been edited by StevenL: May 10 2021, 06:25 PM

Change new LED bulb and not sure why is higher

Lazada is selling the B4K with CPL filter.

To all car manufacturers are void warrant if not factory install.