Features: brand new and high quality Main functions: Support real-time GPS/AGPS/WIFI/LBS positioning, SOS help, vibration alarm, dial family number phone, pedometer, electronic fence warning reminder, historical track query, alarm clock function, class mode, power saving mode. Chip: MT2503/MTK3333/MTK5931. Multiple positioning modes: GPS + AGPS + Wifi + Beidou + LBS. Universal GSM+GPRS quad-band system: 850/900/1800/1900MHz. Location query: the user’s specific location can be queried through a mobile phone or computer. Electronic fence: delineate an area on the map with the device as the center, and alarm immediately when the area is exited. Specifications: Material:PCB Size:Approx.35x20x4.5mm/1.38x0.79x0.18in Net Weight:16g Package Includes: 1x GPS Tracker note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.