4ch 3G,GPS mini Car DVR with 3.5inch TFT screen,support 2 ... optional 4ch 3G,GPS mini Car DVR with 3.5inch TFT screen,Car Black box,Vehicle DVR,mini mobile DVR JD-MDVR8800 series ... this powerful GPS tracking can be easily realized by cell phone, or PC (software).4ch mini car DVR with 3. ... real-time tracking capabilities, using GPS.18. The real-time longitude, latitude and car moving speed will be stamped ...