Canon imageCLASS MF4150 Laser Duplex P/s/c/f 21PPM Adf Compact multi-function unit prints, copies, color scans, and faxes Up 21 ppm/cpm laser output speed Duplex (2-sided) output; 35-sheet automatic document feeder Up to 9600 dpi color scanning resolution Dimensions 15.4 x 17.7 x 16.8 in. (WxHxD); weighs 28.2 pounds