Canon i-SENSYS MF4550d, Laser, Mono printing, 1200 x 600 DPI, Mono copying, Colour scanning, A4 Canon i-SENSYS MF4550d. Print technology: Laser, Printing: Mono printing, Maximum resolution: 1200 x 600 DPI. Copying: Mono copying, Maximum copy resolution: 600 x 600 DPI. Scanning: Colour scanning, Optical scanning resolution: 600 x 600 DPI. Faxing: Mono faxing. Maximum ISO A-series paper size: A4 The Canon i-sensys 4550n is identical to the MF4570dn except that it isn't network compatible. The machine is otherwise the same. It will therefore give the same print quality, there will be the same cost per page (the same cartridges) and speeds are t... Good speeds, Networked, fax and doublesided, Turns on rapidly from sleep mode, Quieter than average, Intuitive and easy to use No network, High cost per page: 2.8 pence, Shades of grey poorly reproduced, Copies are poor quality, Consumables supplied but partially empty The Canon i-sensys MF4550d is a responsive printer, turns on fast and prints rapidly. Nevertheless quality won't satisfy the most demanding and cost per page is quite high if you do a lot of printing....