This product applies the newest technology in Taiwan and has following advantages: small size, clear voice, long stand-by life, simple operating, stable functions and convenient installation. Using SIM card and supporting GSM850/900/1800/1900MHz,it has the following functions: sound control dialing, environmental surveillance, LBS positioning, SOS emergency call and VOX back call. For the voice callback, using dual mic, it offers high sensitivity. Platform inquiry supports location inquiry, track inquiry, battery status inquiry, and electronic fence etc. functions. It is widely used for household monitoring; children, the elder, and pets' care and the trace for lost cars or other possessions.