Waterproof shell Built-in large capacity 6000MA battery, long standby time of 100 days. Powerful magnets to absorb to vehicle firmly. Real-time tracking, retrieve of lost vehicles, cargo. Movement alarm, Geo-fence alarm, shock sensor alarm, remote monitoring. Support map viewing on mobile phone screen, get absolute address by SMS, GPRS real time tracking on web based server. Built-in high sensitivity GPS and GSM antenna to make it can be used alone without installation, convenient and quick. Support for external GSM antenna, GPS antenna, and external power supply for the tracker to be installed on the device which can provide power for long-term using. Network GSM/GPRS GPS Accuracy 5m GPS Start time Cold status 45s,Hot status 1s Battery 3.7V 6000mA/h Polymer battery Charge time 5h Standby time GSM sleep mode 1500h