Full duplexing functionality offers two-sided copying, scanning and faxing of originals as well as double-sided printing, saving time and reducing paper waste. Single cartridge system reduces downtime by requiring just one user-replaceable consumable. On-Demand SURF (Surface Rapid Fixing) technology uses a linear ceramic heater for fast warm up and quick first prints. PC-fax function lets you fax documents directly from your PC, reducing paper and printer usage. Toner save mode decreases consumable usage by up to 20 percent. High-quality color scanner is ideal for archiving business documents. Print Technology: Laser; Maximum Print Speed (Black): 23.0 ppm; Maximum Print Speed (Color): N/A; Network Ready: No.