1. Ultra-compact design with GPS positioning accuracy within 5 meters, supporting global positioning. 2. Clear voice calls, remote control functionality, and remote recording capability. 3. Compatible with computer and mobile applications for convenient monitoring. 4. Supports administrative account setup for efficient management of multiple devices. Specifications: Chip: MT2503 / MTK3333 / MTK5931 Memory: 32MB Flash Power Amplifier: RDA6625E Operating Temperature: -20°C to +70°C Operating Humidity: 20% - 80% RH SIM Card: Nano SIM GSM Band: 850MHz / 900MHz / 1800MHz / 1900MHz GPRS: Class 12 Battery: 3.7V 400mAh Average Standby Current: Less than 2mA (varies by connection method) I/O Interface: Built-in mini 5-pin Speaker: 0916 AAC Microphone: High-definition silicon microphone (audio pickup within 10 meters) Sensor: 3D G-sensor TF Card: Supports up to 32GB for extended recording GPS Positioning Accuracy: Within 10 meters WIFI Positioning Accuracy: Within 50 meters GSM Positioning Accuracy: 50-200 meters (depending on network conditions) Speed: 0.1 m/sec GPS Time to First Fix: Cold Start - 38 seconds, Hot Start - 2 seconds (actual time may vary based on environment) Housing Material: PC GSM Antenna: PIFA antenna Standby Time: Depends on battery capacity and connection method Operating Voltage: 3.5V - 4.2V (auto shutdown at 3.4V low power) Charging Current: 5V 800mAh (adjustable based on battery capacity) Color: Silver Material: Plastic + Metal Dimensions: 35 x 2 x 4.5mm Package Contents: 3 x GPS Tracker Note: SIM card insertion and ejection style may vary randomly; specific style cannot be requested. Package includes only the items listed above; other accessories are not included. Note: Lighting and display differences may cause slight color variations between image and actual product. Measurement error allowance: +/- 1-3cm.