HP (Hewlett Packard) LaserJet Pro 400 M401dn (CF278A) is a monochrome (black and white), workgroup printer. It has a print resolution of 1200 x 1200 dpi with HP's Image Enhancement Technology, which makes each print clearer and sharper. It has a print speed of 33 pages per minute with first page out in 8 seconds. The HP LaserJet Pro 400 M401dn has a 300 sheets total input capacity and 150 sheets output trays capacity, it includes 1 x 250 sheet input tray and 1 x 50 sheet multipurpose tray. The total maximum capacity is 800 sheets. The HP LaserJet Pro 400 M401dn media types are envelopes, transparencies, labels, plain paper, heavy-weight paper, cards and recycled paper. It's media size is C5, A5, Executive, B5, A6, A4, Letter A Size, Legal and JIS B5. It has a monthly duty cycle of 50,000 sheets. It also features automatic duplexing, 256 MB RAM, ethernet and USB connectivity. HP LaserJet Pro 400 M401dn uses 80A and 80X black cartridge. Cartridge model numbers are CF280A and CF280X.