gps Tracking software, gps tracking hardware, gps gsm software Listen-in Two-way Audio Inbuilt Tremble Sensor SOS help gps Tracking software, gps tracking hardware, gps gsm softwareFeatures: ... or GSM 850/900/1800/1900MhzGPS Module: latest GPS SIRF-Star III chipsetGPS Sensitivity: -158DbGPS Frequency: ... .1 m/sTime Accuracy: 1 us synchronized to GPS timeDefault datum: WGS-84Reacquisition: 0.1 sec., ...