3.5G/4GWirelessModemSpecificati***:Maxtransferrate:7.2MbpsHSDPA/UMTS:850/1900/2100mHHzEDGE/GPRS/G***:850/900/1800/1900MHzDataand***SZero-CD,autoinstallationMicroSDmemorycardslotOperationtemperature:-20→/+60→Supportmakingphonecalls,sendouttheinformationRequirements:300MhzCPU256MBRAMMicrosoftWindows7/Vista/XP/2000InternetExplorer5.5orlater40MBfreeharddiskspace................Moredetailspleasecontactastdcn@orSkypeastdcnormobile008615999546015,thanks!)