At-1 gps tracker is the world¡¡¥s smallest surface of a personal remote positioning tracking devices, based on gps technology and gsm / gprs technology made of. Access to the user via sms latitude and longitude location information, and then in google maps or other mapping software found on the user¡¡¥s location; or tracking ing Support sms/gprs two way tracking Support calling function Support sleep mode, can work 110hours. Support monitor function Support single location and continuous tracking Support ge fence alarmsupport quick dialing buttons for 3 preset phone number Support google link alarm tracking Support daily report Support sos alarm Support time zone function Support low power alarm function Neutral color package