Adopts imported smart chip, high sensitive module; Let car DVR auto power on and recording if there is someone scratch, smash or crush on your car; Auto charging the device when car powered on; Monitor time can up to 30 days, no need to charge; Suitable for almost car DVR; Easy to install; Auto monitoring after car stopped running; With smart power on, sound activated power on and vibration power on; Input voltage: 12V; Output voltage: 5V