Supports working with no server: report real-time location, \r\n\r\ntime and speed manually input latitude-&-longitude for target\'s geographical-informations multiple-alert output: low battery + location; emergency alter + location geofence: restrict the movement of target within a defined district and report if violated records and report the last location when entering a place out of reach of gps signals, i.e. underground parking convert alert; able to communicate with a fixed number \r\n\r\nautomatically start the power saving mode at idle state.