... new product based on the GSM / GPRS network and GPS satellite positioning system, which set multiple functions Product Description: Model: ... new product based on the GSM / GPRS network and GPS satellite positioning system, which set multiple functions of security, positioning, ... logistics/Vehicle rental Technology parameter:1,GPS chip: SIRF3chip 2,GPS sensitivity: -159dBm 3,GPS accuracy :5m 4,Time To ...