... Charge 4.Free map GPS/GPRS Tracking Platform, online tracking fleet management systemFree online tracking functions: 1. Live Track, history play back2 ... VIP Yearly fee paid account of gps/gprs tracking platform, online tracking fleet management system TS031. Integrated GPS & GSM antenna, ... 5.3VDC -16VDC; 12.Odometer function; GPS/GPRS Tracking Platform, online tracking fleet management system TS03