... based on GSM/GPRS(850/900/1800/1900MHZ)wireless telecommunication internet and GPS satillite global position ... vehicles, cargo.Movement alarm, Geo-fence alarm, shock sensor alarm, remote monitoring.3,Support map viewing on ... Active and deactive DOOR ALARM, ACC ALARM, SENSOR ALARM by remote control9,tracking function by timing ... tracker with waterproofshell,build-in shock sensor,large capacity battery,