... video+2 CH audio,3G,GPRS,are optional 4ch 3G,GPS mini Car DVR with 3.5inch TFT screen,Car Black box,Vehicle DVR,mini mobile DVR JD ... PAL/NTSC TV system;15. Multi-language operation menu, plug in and play, no need software installation;16. Online upgrade is ... phone or computer. Parameters ModelMDVR8800 series (4-CH HDD DVR)Working VoltageDC 8-36 V(DC 14-36 V when power camera ...