GPS strong magneticlong belt machine positioner

GSM module: GSM900 / 1800 / 1900MHz GPS sensitivity: -159dBm GPS center frequency: L1, 1575.42MHz GPS positioning accuracy: 2-25 meters GSM positioning accuracy: 100-500 meters Speed accuracy: 0.1 m / s Operating temperature: -40 --- 85 ℃ Humidity: 5% --- 95% Size: 78mm * 45mm * 25mm Voltage: Rechargeable 5000mAh battery (3.7V) Power: DC5V charging circuit Standby time: more than 30 days The main functions of this machine: 1.Positioning and monitoring function: Globally, continuously monitor targets in real time, and realize 24-hour positioning monitoring with a positioning accuracy of 5-20 meters. 2. Electronic fence function: After setting the restricted area, when the target exits or enters the restricted area, the positioning terminal will alert the preset authorization number or the monitoring center, and return the target's latitude, longitude, speed, and other data to the control center . 3. Emergency alarm function: When an emerg