... speed alarm 4.Cut fuel/circuit 5.Data logger, Remote update DB-8SS gps tracker system is a small size but ... report, over speed alarm, Cut fuel/circuit, Data logger, Remote update, Support TCP / UDP; GPRS/SMS.2. Technical parameterItem Technical parameterWorking ... relay control 500 mA @ DC 12V1 RS232 data port for firmware upgrade and PC setup1 data port for handset phone / MDT ...