Spec: Chipset: Qualcomm MSM5209Data  Network:GPRS/EDGE system Transmission rate:GPRS-115.2K bps EDGE-460.8K bps High sensitivity:rotation 360 degree antenna Support Bands: GSM/GPRS/EDGE(850/900/1800/1900MHZ) Data transmission, voice recognition, SMS function EDGE MS Class 12 more gap function (up to four time slot 4 time slot to send and receive, send and receive time slot is not a total of more than 5 slots) several APN(access point name) Support multiplexing applications Firmware can be upgraded Support operate system:Windows 2000/XP/VISTA.