Features: 1. Extremely small volume, GPS positioning within 10 meters, and global positioning capability. 2. Clear calls and remote monitoring. 3. Convenient monitoring via computer and mobile app. 4. Set up an administrative account for easier management of multiple devices. Specification: Chip: MT2503/MTK3333/MTK5931 Memory: 32M flash memory RF power amplifier: POWER Motherboard stack size: 20*35*4.5mm (thickness includes PCBA+GPS antenna) Working environment temperature: -20°C - +70°C Working environment humidity: 20%-80% RH SIM card: for Nano SIM card holder GSM band: 850MHz/900MHz/1800MHz/1900MHz GPRS: Class 12 Battery: Charging 5V 3.7V 800mAh Standby average current is less than 2mA (determined by connection method) I/O interface: built-in Micro 5pin Speaker: 0916 specification AAC MIC: High-definition silicon wheat (sound can be heard within 10 meters) Sensor: 3D G-Sensor TF: Support 32G long recording GPS positioning accuracy: within 10 meters WIFI positioning accuracy: within 50 meters GSM positioning accuracy: 50-200 meters Speed: 0.1 for m/sec GPS positioning time: cold start -38s (Open for Sky) warm start -2s (Open for Sky) specific time will be affected by the environment Shell: PC GSM antenna: PIFA antenna Standby time: determined by battery capacity and connection method Working voltage: 3.5-4.2V (3.4V power automatic shutdown) Charging current: charging 5V 800mAh (current can be set according to different battery capacity) Quantity: 1PC Note: 1.Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: (no retail packages) 1 x GPS Tracker