4ch 3G,GPS mini Car DVR with 3.5inch TFT screen,support ... HDD interface,4 CH video+2 CH audio,3G,GPRS,are optional 4ch 3G,GPS mini Car DVR with 3.5inch TFT ... .5 SATA HDD interface,4 CH video+2 CH audio,3G,GPRS,screen all are optional Function 1. Immediately auto record ... FunctionsPanning Table control support GPS chart recorder(black box) 4ch 3G,GPS mini Car DVR with 3.5inch TFT screen