Function:1.Remote calling2.Long distance speech monitoring3.Electronic defence, low battery alarm4.Positioning: GPS+LBS double positioning5.GPS+LBS Location6.Call Function:One way to call the device and Voice Monitor7.Historical route:90 days route checking8.Low power alarm9.ON/OFF Button10.Remote turn off11.Do not disturb mode Specification:Material: ABSColor: Black + Pink GSMHost size: 56 * 38 * 17mmStrap Length: 60cmButtons: Power buttonInterface: DC jack, Micro-SIM card slotSupport band: GSM 800/900/1800/1900Battery Capacity: 500mAh, 3.7V built-in batteryOperating voltage: 3.3-4.2V DCGPS positioning upload time: You can 30 seconds / 10 minutes / 1 Hour setGPS sensitivity: -159dBmGPS position accuracy: 5-15MWorking temperature: -20  ~ + 50 centigrade degreeHumidity: 20% ~ 80% RHWaterproof: IP58Packing List:1 * Main Unit1 * USB Cable1 * Collar1 * Screwdriver1 * User Manual (No Sim Card and SD Card included)