The B40 is one of the smallest and least noticeable dash cams out there. Additionally, this dash cam is completely black and fits right behind the mirror. This camera looks like part of the car, not an addition.
When this cam is rapidly heated, some users have reported the video to be blurry or out of focus. Although this is an inconvenience, the cam is still able to do its job.
While the Mini 0803 is great for the price, it isn't guaranteed to last very long. It is common for it to randomly turn off or start beeping uncontrollably after just a few weeks of use.