Astro 110 Kids smart watch use the top tracking technology to help you locate the child's geographical location precisely. Through Geo-Fence alarm protect your kids in their activity are, once the child out of the preset area will trigger the alarm and notify you through the app. Features 1. Real-time positioning, monitoring, tracking 2. Pedometer 3. SOS Emergency Alarm 4. Remote Shutdown 5. Geo-Fence 6. Safe Zone Setting 7. Low Battery Alarm 8. Watch Take Off Alarm 9. Fast Location 10. Remote Monitoring 11. Mobile App or Computer service platform dual control 12. Android and iPhone Support 13. Leather Hand Strap 14. Additional Silicon Hand Strap Specifications • Speed Accuracy: 0.1m/sec • Screen Size: 0.96 inch OLED • Battery: 3.7V 400mAh lithium polymer battery • Standby Time: 3 days • Compatible Devices: Android and iOS devices • Weight: 35.1g • Maximum Altitude: 18000m • Position Accuracy: 10m (2D RM) • Working temperature: -20~70℃ • Humidity: 5% ~ 95% RH • Dimension: 31mm*52mm*11.2mm