originalunlocked 7.2M hsdpa USB modem Huawei E173 Original Huawei E173 3G USB modem / 7.2Mbps wireless HSDPA modem with Micro SD memory card slot  Huawei e173 wireless USB modem / 7.2Mbps hsdpa 3g modem Key Featuresl         HSUPA/HSDPA/UMTSl         EDGE/GPRS/GSM 850/900/1800/1900MHzl         Equalizerl         Micro SD card slotl         Data and SMS servicel         Plug and play System requirementsl         Windows 2000 SP4, Windows XP SP2/SP3, Windows Vista SP1/SP2, Windows 7l         Mac OS*10.4,10.5 and 10.6 with latest upgradesl         Hardware system should meet the recommended requirements for the installed OS versionl         Display resolution:800*600 or abovel         Standard USB interface