... remote targets.Locate precisely, Be widely applied in safeguarding vehicle,old,child,Pet,and managing personel; Track covertly etc. Advantage:1 ... -fence: restrict the movements within district.10. Listen in to & talk with a fixed number. Application:1. Used in vehicle rental ... , outer equipment etc.2. Monitor and protect the child, old, disabled, pet etc.3. Provide peace-of-mind for businessmen ...