I installed an identical rearview DVR GPS on the weekend. Found that I can flip the horizontal rear view image with a setting on the camera software.
Peeves – doesn’t remember where you left of when you start the car, need to change the front view image to rear view when starting, the audio playback does not resume or remember what you have already played.
Although a great little system for the money, these niggling things would make you crazy for a bit.