... SD card 3G GPS mobile DVR for car use 1.H.264 2.DC input 7 ... when accidental power failure occurs, even can work for 10sec - 15sec6.Support various recording modes: auto ... .Support forward and backward at the speed of: x 2, x4, x8, x16.AlarmInputSupport up to ... alarm output, level signal.Communication PortRS232 for remote control; RJ45 for LAN.GPSYes, built-in GPS moduleWireless TransmissionGPRS ...