Features: 1. Extremely small volume, GPS positioning within 10 meters, and global positioning capability. 2. Clear calls and remote control. 3. Viewable on computer and mobile APP for baby monitoring, offering convenience. 4. Create an administrator account for more convenient multi-device management. Specification: Chip: MT2503/MTK3333/MTK5931 Memory: 32M Flash Memory RF Power Amplifier: RDA6625E Motherboard Stack Size: 20*35*4.5mm (thickness is the total thickness of PCBA+GPS antenna) Working Environment Temperature: -20°C - +70°C Working Environment Humidity: 20%-80% RH SIM Card: Nano SIM card holder GSM Band: 850MHz/900MHz/1800 MHz/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 Microphone: High-definition silicone wheat (sound can be heard within 10 meters) Sensor: 3D G-Sensor TF: Supports 32G long recording GPS Positioning Accuracy: Within 10 meters WIFI Positioning Accuracy: Within 50 meters GSM Positioning Accuracy: 50-200 meters Speed: 0.1 m/sec GPS Positioning Time: Cold start -38s (Open sky), Warm start -2s (Open 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 low power automatic shutdown) Charging Current: Charging 5V 800mAh (current can be set according to different battery capacities) Quantity: 1 pc 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 packaging) 1 x GPS Tracker