Huawei E171 Unlocked GSM HSDPA 7.2Mbps 3G USB Modem Huawei E171 HSPA USB Modem is an ultra slim USB modem that is ideal for users who need high speed data on the move Transmission Rate: 7.2 Mbps. With Micro SD card slot 3G Frequency Band: HSDPA/UMTS 2100MHz 2G Frequency Band: GSM/GPRS/EDGE 850/900/1800/1900MHz Compatible: Windows 2000/XP/Vista/Windows 7/Mac and Linux OS