Higooda Mini 0.8" LCD Quad-Band GSM GPS Wrist Watch Tracker Phone for Kids - Black GSM Channel: GSM 850/900/1800/1900Mhz, Quad bank, used in worldwide, . GPS Sensitivity: -159dB Besides SOS function and shortcut calling to guardian, this smart GPS tracking watch also can send the location information to mobile and computer quickly by sending message. Also, you can get the tracker location information by online tracking service platform. Supports both GPS and GSM positioning. Three saving power modes, long time standby. Store the tracking history as long as three months. Can set electric fence, once the device break it, you will get SMS notice. Perfect for keeping an eye on loved ones. With built-in high sensitive microphone, real-time monitoring the sound around the device when in emergency situation