Manufacturer Specifications, Primary Function: Quadband Waterproof GPS Tracker, Waterproof rating: IP67 (up to 0.8 meters), GSM Module: GSM 850/900/1800/1900Mhz, SIM Compatibility: 2g, 2.5g, 2.75g. GPS Chipset: SiRF Star 3. GSM Sensitivity: -102dBm. GPRS Sensitivity: -159dBm. GPS Accuracy: 5 meters, Time to first fix: Cold start: 35 sec, Warm start: 2 sec, Hot start: 2 sec. IO Interface: Mini USB for Charging. Battery: rechargeable Li-Ion battery (750 mAh). Battery Life Standby: 48 hours. Battery Life Running: 8 hours. Operating Temp: -10C to 65C. Dimension: 52 (L) x 40 (W) x 23 (H). System compatibility:Windows7 and Windows Vista(32)