unlocked huawei E1756C modem Brand/ModelHuawei 3G USB Modem E1756Network TypeWCDMA (3G)Serivce SupportedUMTS/HSDPA/UMTS/EDGE/GRPS/GSMBand2G: EDGE/GPRS (850/900/1800/1900MHz)3G/3.5G: HSDPA/UMTS (850/1900/2100MHz)Transfer rateHSDPA: 7.2Mbps& HSUPA5.76MbpsOS SupportedWindows 2000/XP/Vista/WIN 7 and Mac OSInstall DiscAn automatic installation wizard built-in the USB deviceUSBUSB2.0 (High Speed)Expandable Card SlotSupportup to 4GB Micro-SDVoice callSupportUsageIt can be widely used for notebook/laptop/UMPC/MID device. Your best tool when you need web browsing/Internet during outdoor