Real-time Updates, More Accurate Positioning: Built-in GPS + GLONASS + base station location methods to ensure stable signal transmission and no loss Track playback: Through the track playback function, the device's time, speed, track, location, etc. are displayed on the APP Electronic fence: Set a virtual fence on the mobile phone, and the mobile phone will send a alert prompt when the device enters or leaves the fence range 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 Remote Power On/Off: It can be placed anywhere and can be turned on and off remotely with a single click on the mobile phone APP. It can be turned on and off at any time, and the battery life is longer and more durable Specification: Communication frequency: 850/900/1800/1900 MHz Operating voltage: 3.3V-4.2V DC Operating temperature: -40℃ ~ 80℃ Charging voltage: DC 5V Battery capacity: 700mAh Material: ABS GPS positioning accuracy: 5-25m Alarm mode: vibration alarm, SOS alarm, fence alarm Battery type: polymer battery Use time: 96h Waterproof function: life waterproof Antenna type: built-in GPS ceramic antenna External power supply form: USB charging Map function: Google, Baidu, AutoNavi Interface language: support multiple languages Note: You need to insert a SIM card (not included) to use it!