1. Long-range sound detection, stable positioning, and accurate positioning. If an elderly person or child is lost or in danger, press and hold the SOS button for 3 seconds and then release it, and the system will automatically call for help. The added WiFi positioning function allows for positioning in underground parking lots, indoor parking lots, and even tunnels. 2. Strong magnetic attachment eliminates the need for installation and allows for convenient real-time positioning. 3. When your vehicle enters the designated lane, the mobile app will immediately notify you when the tracker is powered on or off. Memory: 32GB Recording range: 80 square meters View: SMS + App + PC Location modes: GPS/Wi-Fi/LBS/AGPS Battery type: 3.7V 500mAh Charging voltage: DC 5V Charging input: AC 110-220V 50/60Hz GPS positioning accuracy: Approximately 10 meters Standby time: 10 days Working time: 4-6 days Dimensions: 42*26*15mm Includes: 1 * GPS tracker 1 * USB cable 1 * Manual