Main ChipQSC 6280Frequency bandHSDPA/UMITS:2100MHZ,GSM850/900/1800/1900MHZTechnical Standards WCDMA(hsdpa) Sensitivity-104dBmData Service RateMax7.2Mbps(download)/384Kbps(upload)SMS servicessupportR-UIMsupportAT command Supports the standard AT command setTemperatureNormal operating temperature:-20°C~+55°CStorage Temperature:-30°C~+65°CVoltage5.0vROHS EnvironmentalComply with ROHS environmental protection certification requirementsCE CertificationMeet the 3C standardInterfaceUSB 2.0 Interface, Plug & Play,Receiver FeaturesDual antenna ,Receive DiversityMicro SD Card SlotSupportDriver InstallationFree CD-ROM installationSupport OSWindows XP/VISTA Win7 32/64mac ,English System. Other language versions can be modified according to user needsPhysical Dimensions81(L)X26(W)X11(L)MMColorWhite, black(SELECTED)