Warm and important tip: 1.This USB DVR works for system higher then Android 6.0 Multimedia player, and not fit all the DVD; 2. This DVR video quality is very good at night, ADAS works fine? 3. The speed and position in the dvr is not 100% true, just for reference; Discreet Design Mini size allows the device to be a well-hidden witeness to the road ahead ADAS Function When the device detects the vehicle in front to close, it will alarm to remind motorists to pay attention to road conditions or abnormal vehicle. LDWS Function The device driver unconscious deviate from the original lane when the lane departure alarm is automatically triggered. Basic Function Loop recording New recordings will automatically overwrite oldest recordings when the memory card is full, yet locked videos will be safe from being overwritten. G-sensor If a vehicle collision occurs, the build-in G-Shock sensor automatically locks the recorded video providing an accurate record of events. Motion Detection with motion detection is enabled, when the vehicle recorder detects the movement of the object, the camera starts recording, and the camera automatically enters the motion detection standby state after the motion detection is finished. When the object is detected again, the camera function is started again.