... , 3.Car key mini dvr, 4.Support SD/MMC card:Up to 32GB Four keys of the car hd mini ... Next4 KeyD-set \ video \ stopWhen the recorder is powered on, the unit is in preview mode, the input image can be ... coverage If this feature is turned on, when the SD card is full, it will overwrite the old video1.1. ... coverage If this feature is turned on, when the SD card is full, it will overwrite the old video1.2. ...