based on GSM/GPRS (850/1800/1900Mhz or 900/1800/1900Mhz ) network and GPS satellite positioning system to track the far-way object conveniently by short message, internet or PDA.

Advantages: Easy to find the position: No need to build special platform, checking directly by short message, internet, PDA. So it can take down the cost for the server and the customers. It also supports other kinds of platform to track.

Compact size: 46*64*17mm(1.8*2.5*0.65inch)

Weight: 40g

With the antenna and battery inside, easy to carry on.