Dual SD card 3G GPS mobile DVR for car use 1.H.264 2.DC input 7-48V 3. ... fuel cut-off Dual SD card 3G GPS mobile DVR for car use1.H.264 video compression format, 4CH video input, ... adjusted.Output2Ch alarm output, level signal.Communication PortRS232 for remote control; RJ45 for LAN.GPSYes, built-in GPS moduleWireless TransmissionGPRS, EDGE ... ) mmNet Weight450g Dual SD card 3G GPS mobile DVR for car use