Battery-powered personal GPS terminal conditions, reported in a minute once can work continuously for more than 48 hours, external high-capacity battery (6000MAH) work long hours (1 week). The main features are as follows: 1. Compact and easy to carry, can carry placed or worn. Built-in battery-powered and equipped with high-capacity external battery pack with charger 3 location information via SMS query, reporting interval adjustable. Technical parameters: Power supply: battery-powered and can work continuously for more than 48 hours (according to one minute be reported once dollars) 2. Positioning time: cold start <40s, Hot start <15s. Positioning accuracy: <15m 4. Speed ??Accuracy: 0.1m / s 5. transmission interval: 1 minute 1 second fastest to 10 seconds. supports channel: GPRS, CDMA 7. maximum battery capacity 1800MAH (external battery conditions to 6000MAH)