Regional alarm SOS Emergency Alarm Support Phone calls Low power consumption, long standby, track 20 satellites Function:Vehicle rental / Fleet management etcProtect child / the old / the disabled / pet etcProvide peace-of-mind for businessmenManage personnelTrack criminals secretlyParameters:GSM900/1800 MHz or 850/1900 MHzGPRSClass 12 , TCP/IP build in GSM Modulechanneltrack 20 SatelliteGPS ...