... Details:Working Based on existing GSM/GPRS(850/900/1800/1900MHZ)network and GPS satellites, this product ... and optional 2GB external SD card at most.2.Powerful magnet+water proof,adsorbing in the hidden ... Small cubage;Dimension: 46*64*17mm (1.8*2.5*0.65inch) Weight: 40gIntegration design(antenna and ... view current location on map on cellphone screen. 2,Get absolute address by SMS3,PC Installation software ...