The HP 640 Inkjet Fax Machine will simplify your everyday faxing and copying. The highlights of the machine includes convenient one-touch buttons and easy-to-follow menus. The plain-paper fax machine gives you crisp black output on plain paper and fast faxing. You can now fax documents at 6 seconds per page as well as copy up to 4 pages per minute. The inkjet fax machine allows you to save time by programming up to 100 speed dials. Other important feature of the fax machines includes simple one-touch dialing, and automatic feed of 10 pages at a time and automatic redialing when a number is busy. The 50-sheet tray allows you to load plenty of paper and store up to 50 incoming pages. You will never have to worry about missing a fax due to paper or ink shortage. The compact design of the HP fax machine saves space on your desk and its easy to use menus provide practical usage options.