Quantity: 1pcsUSB 2.0 InterfaceThe maximum speed of up to 56KbpsSupports automatic faxSupport computer system comes with XP FAX fax softwareSupport dial-Paperless computer faxSupport Win9X/ME/2000/XP/VISTA/WIN 7/8/LINUXMainly used for computer paperless fax， dial-up Internet access， suitable for office useExternal USB 56K Modem， using conexant chipset， no external power supply， hot swappable features common laptops and desktopsFully compatible with ITU V9.2/K56Flex 5600bps transmission protocolOperating Humidity: 10-90% relative humidity non-condensingStorage Humidity: 5-90% relative humidity non-condensingOperating temperature: 0 �� to 40 ��The size of the main case: 75 * 26 * 20 mmUSB cable length: 137 millimeters， product net weight: 30 gramsCE certification and RoHSEasy and Convenient to usePackage Include: 1 x USB 2.0 56K V.92/V.90 Fax Modem (Without retailing packing) 1 x Telephone cable (about 120cm) 1 x CD Driver