Features: 1.Real-time tracking. 2._x000D_ Historical track playback. 3._x000D_ Electronic fence. 4._x000D_ SOS call for help and one-click dialing. 5._x000D_ Voice tells the time. 6._x000D_ Fall alarm. 7._x000D_ Two-way high-fidelity voice call. 8._x000D_ Silent care. 9._x000D_ Low battery alarm. 10._x000D_ Card replacement prompt. Specification: 2G GSM frequency band: 850/900/1800/1900MHz_x000D_ GPRS standard: Class 12, TCP/IP_x000D_ GPS positioning time:_x000D_ Cold start: 60sec (outdoor open sky)_x000D_ Warm start: 29sec (open sky outdoors)_x000D_ Hot start: 5sec (outdoor open sky)_x000D_ GPS positioning accuracy: 10-15 meters (outdoor open sky)_x000D_ WiFi positioning accuracy: 15-100 meters_x000D_ Base station positioning accuracy: 100-1000 meters_x000D_ Working temperature: -18 ~ +45_x000D_ Working humidity: 5% ~ 95% RH_x000D_ Size: 40.5*43.3*13.8mm_x000D_ Net weight: 25g_x000D_ Battery capacity: 450mA PackageList: 1*Host _x000D_ 1*USB charging cable _x000D_ 2*Instructions _x000D_ 1*Lanyard _x000D_ 1*Siamese rubber sleeve