... Cards 4. H.264 compression format 3G Mobile DVRIntroduction1,Support 4CH video,CIF,HD1,D1 resolution ... , time, date, license plate number and other data in the video.3,Built-in GPS,3G wireless ... SD card slotDual SD card Slots3G SD card Mobile DVR with antennaBackColor PackagingThis is the video image ... of 4CH 3G Mobile DVR. You can see time, date, vehicle ...