Real-time Updates, More Accurate Positioning: Built-in WiFi + BeiDou + LBS + GPS and other multiple positioning methods to ensure stable signal transmission and no loss Ultra-long Standby: Built-in large-capacity battery, long-lasting battery life. When the battery power is less than 20%, the device will send a low voltage alarm prompt Strong Magnetic Adsorption: No need to punch holes for installation, built-in high-strength industrial strong magnets, making the adsorption more stable, it can be directly adsorbed to the metal surface and will not fall off easily 180-Day Track Playback: You can use the track playback function on the mobile phone APP to display the device's historical track, stay time, track, etc Electronic Fence: The device is virtual fenced on the mobile phone. When the device enters and exits the fence range, the mobile phone sends a reminder notification Quickly Find Location: Built-in street view navigation function, you can clearly see the environment near the device on the mobile phone App, so that you can quickly find it Specification: Battery capacity: 800mAh LED indicator: 3 (power, GSM, GPS) Communication method: GPS/BeiDou/LBS/WiFi Voltage range: 3.7-4.2V GSM frequency band: GSM 850/900/1800/1900MHz GPS receiver: high-sensitivity GPS receiver Material: plastic GPS positioning accuracy: 2m Alarm method: vibration alarm, power failure alarm, SOS alarm, fence alarm, speeding alarm Battery type: polymer battery Use time: 120h Waterproof function: waterproof for daily use Antenna type: built-in antenna External power supply form: USB Map function: Baidu map, Gaode map, foreign trade support Google map Resolution: None Interface language: Chinese and English Note: You need to insert a SIM card (not included) to use it!