The Kingslim D4 is a Chinese dual channel dash camera released in Jul 2020. The Kingslim brand is trademarked by a Chinese company named HKSO Technology. This low priced dual dash cam has been gaining popularity on Amazon.
The Kingslim D4 is based on the HiSilicon Hi3556 processor. It uses a Sony Starvis IMX335 CMOS sensor for the front camera but the manufacturer does not disclose the CMOS sensor for the rear camera. These are identical specifications to its sibling, the Kingslim D2 and are reasonable components for this price range.
It is disappointing that Kingslim advertises the D4 as a 4K camera when this is not a true statement. 4K cameras must have a native resolution of 3840 × 2160p. The 5MP Sony IMX355 CMOS sensor only has a maximum native resolution of 2592 x 1944p.
The front camera records 1440p (Quad HD) video at 30fps with an average bitrate of 12 Mbps. Video quality for the front camera during the day is good and night quality is above average. Using a higher resolution will result in larger files but video quality does not improve since it is interpolated.
The rear camera records 1080p video at 30fps with an average bitrate of 10 Mbps. Unfortunately the rear camera footage is noticeably worse than the front camera particularly at night. Rear cam video quality is good during the day but below average at night.
The rear camera is waterproof and can be used externally. Depending on your vehicle, mounting this externally may not be the easiest. That being said, the rear camera can be mounted internally.
While the video quality of the Kingslim D4 is similar to the Kingslim D2, the D4 has more features than the D2. The D4 comes with a 3″ touchscreen, g-sensor and has built in GPS.
The camera also comes with WiFi and Kingslim recommends using their “Roadcam app”. As of November 2020, this app is not available on the Google Play store but must be downloaded from the Kingslim website. If you trying using one of the many Roadcam apps on the Play store, you will likely not be able to connect with the camera. Big thumbs down with the app experience.
The D4 provides non-buffered parking mode if you hardwire the dash cam to your vehicle (optional hardwire kit required). Unfortunately the D4 does not come with audio error notifications. It does provide error notifications on the screen but these can easily be missed by the driver.
The camera comes with an adhesive mount and cannot swivel to record interactions at the driver or passenger windows. The D4 is a medium sized camera at 85 x 48 x 17mm. The build quality, while ok, is not the greatest.
Kingslim appears to be responsive to questions but beyond that, the camera has limited support. We have not seen any firmware updates for this camera since it has been launched. Kingslim provides a 12 month warranty, which is standard for most dash cams.
Note that some reviews indicate that Kingslim provides a free gift in exchange for Amazon reviews. This is not ethical and could influence the ratings there.
SD Card Issues
The most common issue with this camera are SD card issues. Numerous owners have indicated SD card errors when using the camera and requests to reformat the card. Ensure you are using a legitimate microSD card with this camera
Like it’s sibling the Kingslim D2, there are reports that the camera runs hot. Given the heat it generates and the usage of a lithium battery instead of a capacitor, hot environments may be problematic.
Should I Purchase
The Kingslim D4 is a low priced dual dash cam with reasonable specs. It is quite similar to the Kingslim D2 but with a few extra features (GPS, WiFi). The front video, while not the best would be acceptable for many people. The rear video is not as good.
The negatives include the false 4K advertising for the camera, the Roadcam app that is not on the Google Play store, limited support and unknown reliability.
We also suspect the free gift in exchange for positive reviews has influenced the Amazon rating for this camera (not an ethical practice).
Published: November 25, 2020