HP (Hewlett Packard) LaserJet 4000tn (C4121A) is a monochrome (black and white), workgroup printer. The HP LaserJet 4000tn has a print resolution of 1200 x 1200 dpi which makes each print clearer and sharper. It has a print speed of 17 pages per minute. It has a 600 sheets total input capacity and 125 sheets output capacity. It includes two 250 sheet tray and one 100 sheet tray. It's media types are greeting cards, transparencies, envelopes, labels, plain paper. It's media sizes are A6, Executive, Legal, A5, A4 and Letter A Size. It has a monthly duty cycle of 65,000 pages and a 1 year manufacturer warranty. It also features 8 MB RAM and parallel connectivity. HP LaserJet 4000tn uses 27A and 27X black cartridge. Cartridge model numbers are C4127A and C4127X.