HP Fax 640 - Plain Paper Fax/Copier Manage your everyday fax and copying needs with the HP 640. With automatic redial 50-sheet paper tray 100 speed dials 10 one-touch deals and management reporting the HP640 allows you to be more productive than ever before. And it s dependable compact and affordable. Simple to use and efficient the HP 640 features easy-to-understand menus that give you quick access to reports system set up and tools. Plus you ll get great performance with crisp black output at a low cost when you use plain paper. The HP 640 fax machine includes 1MB standard memory delivers exceptional print clarity with 300 x 300 dpi copy resolution.