Feature of GPS smart watch:Personal gps tracker,e.g.:mountain-climbing,detective work, person(the old and children) guardianWorldwide use (GSM frequencies:850/900/1800/1900MHz)GPS chip: MTK 24 hours real-time trackingBoth SMS tracking and web tracking availableInbuilt antennaRemote Control,Geo fenceInbuilt GPS ModuleSupports fast dial buttonOne dail, two ways communicationVoice monitoring,Built-in speaker and microphone Removable and rechargeable internal battery