... 25mmN.W0.24KGExterior Power SupplyDC9V-36VInner Lithium batteryDC 3.7V-4.2VExterior GSM antennaReceive GSM Signal betterExterior GPS antennaReceive GPS ... sec., averageWarm start38 sec., averageCold start42 sec., averageI/O port 4 digital inputs (2 negative inputs, 2 positivel inputs ), 2 ... , 2 analog inputs auto GPS /GSM/GPRS/AGPS tracker, engine on& off, geo-fence control,over speed&low power alarm ...