ELP Mini Realtime Sd Car Mobile DVR 4ch H.264 Video/audio Input with Remote Controller Encrption for Car Security Surveillance Removable SD Card Mini Car Mobile DVR Front panel USB2 port for recording to a flash card as an optional storage device H.264 High Profile Video compression car dvr recorder 4CH full-motion color video with corresponding audio tracks Ignition sense that provises DVR power-on in recording mode when bus start