Huawei E303 3G Wireless Modem HSDPA USB Stick 7.2Mbps with TF Card Slot Modem Huawei E303 3G Wireless Modem HSDPA USB Stick 7.2Mbps with TF Card Slot Network type: GSM Network Band 3G - 850/1900. Band 2G - 850/1900 Support system: Windows 7, Windows Vista SP1/SP2, WindowsXP SP2/SP3, Mac OS X 10.5, Mac OS X 10.6 with latest upgrades Data transfer rate: 7.2Mbps;Support system: Windows 7, Windows Vista SP1/SP2, Windows XP SP2/SP3, Mac OS X 10.5, Mac OS X 10.6 with latest upgrades