... car dvr 5.3G function optional MDR-504 Series Vehicle DVR ProductPhoto: MAIN FEATURES:Ø H.264 Video compression ... recording, timed recordingØ Support recording about vehicles state, vehicle no. and vehicle routeØ Support GPS/G-SENSRO/3G module expansion ... recording, time recording, alarm recording StorageSD cardVehicle recording Recording Vehicle operation (turn left/right, stop lamp), license NO. ...