1.system:Windows2000/windows xp/windows vista 2.frequency:2100mhz 3.high speed sending 4.HSDPA 7.MBPS 3.5g wireless usb modem suppot windows2000/windows xp/windows win7 ItemDescription Remark Access mode HSDPA/EDGE/GSM/GPRS Main ChipsetQualcomm 6280 Frequency RangeHSDPA2100MhzEDGE/GSM/GPRS 850/900/1800Mhz/1900M Support operating system Windows7/XP/2000/Vista,Mac Power Supply USB Interface(USB 2.0 ...