Campark 4.3" HD 1920x1080P Car Rear View Mirror Camera DVR Dual Lens Back up G-Sensor 3 functions in 1, Rearview mirror + front camera DVR + rear view camera. Full HD 1080P Recording (Front camera). Loop record, overwrite function, can be used as car black box easyly. Super slim design .After opening the motion detection, it will record automatically if there is anyone entering the picture. The function is normally used to monitor parking. Built-in G-Sensor.keeps important evidence