Canon imageClass D661 is a monochrome multi-function digital printer. It features a print speed of 13 pages per minute and a print resolution of 2400 x 600 dpi.The copier features Canon's exclusive single cartridge system, which contains the drum, development unit and toner in one easily replaceable cartridge. The Canon imageClass D660 uses Canon L50 (L-50) black toner cartridge, with a page yield of approximately 5,000 at 5% coverage, for an economical $0.03 per copy. A 30 sheet automatic document feeder can accept originals up to legal size and reproduce letter-size documents at 13 copies per minute and legal size documents at 10 copies per minute. It also features digital technology, through the touch of a single button, facilitates collating of multi-page documents. The Canon imageClass D660 features Canon's advanced printing technology for high quality laser prints with a resolution of 600 x 600 dpi. It offers fast, efficient paper handling through a 500 sheet front loading paper cassette and a 100 sheet multi-purpose tray, which accepts a variety of media, including bond, plain and colored paper, transparencies, labels and envelopes for fast, convenient operation. For added flexibility and user convenience, this printer model supports both parallel and USB interfaces.