Detailed Product Description 3G modem, 3G wireless modem, HSDPA modem - ZTE MF627HSDPA/UMTS (2100MHz)GSM/GPRS/EDGE (850/900/1800/1900MHz)Support 3.6Mbps HSDPA servicesSupport PC voice (optional) and SMS servicesSupport data statisticsReceive diversity (2100MHz)Micro SD Card Slot,up to 4GbPlug & PlaySupport Windows 2000, Windows XP, Windows Vista and Mac Operating Systems