1.Hight performance chip of SIRF third generation inserted in. 2.Hight sensitivity, short time localization, with the maximum simultaneous reception of 20 satellites'signals 3.Hight pointing accuracy with the minimum error at 2.5 meters. patible with Bluetooth 2.0 standards and Class2. 5.Sppport serial port profile(spp) 6.With the lowest power consumption. it can continuously work for more than 20 hours. 7.3-different-color LED facilitates the ob servation of receiver's active status. 8.it is the miniaturization and the human nature design.