Detailed Product Description HSDPA USB modem, 3G data card, 3G USB modem - O2 MC930D HSDPA/UMTS (850/1900/2100MHz)GSM/GPRS/EDGE (850/900/1800/1900MHz)Support 7.2Mbps HSDPA servicesMicro SD Card SlotSupport PC voice (optional) and SMS servicesSupport data statisticsReceive diversity (850/1900/2100MHz)Plug & PlaySupport Windows 2000, Windows XP, Windows Vista and Mac Operating Systems