Features: 1.Real-time tracking 2.Historical route playback 3.Geo-fence 4.SOS alarm & push-button calling 5.Talking clock 6.Fall alarm 7.Vibrate on Ring for incoming call remind 8.Two way communication 9.Low battery & SIM card change reminders Product Specifications: 2G GSM: 850/900/1800/1900MHz GPRS Standard: Class 12, TCP/IP GPS locating time: 60sec with cold boot (outdoor open sky) 29sec with warm boot (outdoor open sky) 5sec with hot boot (outdoor open sky) GPS positioning accuracy: 10-15m (outdoor open sky) WiFi positioning accuracy: 15-100m (wifi area) LBS positioning accuracy: 100-1000m Working temperature: -18 ~ +45 Working humidity: 5% ~ 95% RH Device host size: 40.5*43.3*13.8mm Battery capacity: 450mA