GSMfctory LCD Smart GPS Tracker Wrist Watch SOS GPRS Tracking with Microphone for Children/Old People Supporting single location and continuous tracking Fast Dial-up button, Emergency situation you can dial SOS button for accurate positioning it can record the latest 3 months movement path, you can check the latest 3 months movement path anytime. Frequency: 850/900/1800/1900MHz, it can be used at any country. Biult -in microphone, you can hear the sund arround of the ddevice when the emergency happened