We are able to accomplish customized tracker design & functions. Features: Support GPRS & SMS configuration Support GSM/CDMA ( 850 / 900 / 1800 / 1900 Mhz ) Low cost , Compact size, High sensitivity Very Low power consumption Fast Signal Acquisition Support single location and continuous tracking Support location triggered by tracker Support location triggered by authorized cell phone Support alarm and remote monitor Support quick dialing buttons for 5 preset phone numbers Support check location by SMS and internet Monitors can track the person without interfering him, LIVE! Real-Time tracking! Locate the locator holder by the mobile phone via SMS (short messaging system) or by GPRS to TCP/IP tracking platform. SOS button send out exact location for immediate rescue/action.