1Real-time positioning, historical trajectory, electronic fence, voice monitoring. 2Vibration alarm, remote shutdown, long standby, two-way intercom. 3GPRS+GPS+LSB multi-mode accurate positioning. 4750 mAh lithium battery, with sensor, intelligent power saving, sleep power saving design. 5Support Android, IOS system, mobile APP and computer and other network clients, We-chat query.Features: Real-time positioning, historical trajectory, electronic fence, voice monitoring.Vibration alarm, remote shutdown, long standby, two-way intercom.GPRS+GPS+LSB multi-modeaccurate positioning.750 mAh lithium battery, with sensor, intelligent power saving, sleep power saving design.Support Android, IOS system, mobile APP and computer and other network clients, We-chatquery.Support communication, Mobile, Uni-comcard.Support AGPS, cold start within 38 seconds. Ultra low power management, smart sleep.Call back, send order, auto dial (center number).Smart fence: the tractor can automatically alarm when it exceeds the setting range.You can check the historical track within 6 months.Specifications: Condition: Color: Shown as Picture Material: ABS Button: SOS button Screen: None GPSAntenna: high sensitivity ceramic active antenna GSM Antenna: FPC antenna Battery: 750mAh (polymer battery) SIM Card slot: 1 Vibration Sensor: support I/O Interface: magnetically attracted contacts Waterproof Rating: IP67 Chip: MTK MT2503+RDA6625E GSM Band: 850/900/1800/1900MHz GPS Chip: G7020 GPRS: Class12 GPS Signal: L1,1575.42MHz C/A Number of GPS Channels: 22 channels GPS Chip-level Receiving sensitivity: Tracking: -165dBm, capture: -148dBm WIFI Positioning Accuracy: 10~50 meters GPS Positioning Accuracy: 5 to 15 meters Base Station Positioning accuracy: 100-1000 meters Minimum Standby Current: less than 0.5 mA Average Standby Current: less than 2.5 mA Average Operating Current: 55mA Working Temperature: -20-70C Operating Humidity: 5% to 95% (Non-condensing) GPS Antenna: Built-in high sensitivity ceramic antenna GSM Antenna: FPC antenna