HP (Hewlett Packard) LaserJet Enterprise M4555f MFP (CE503A) is a monochrome (black and white), workgroup laser printer. It functions as a printer, fax, copier and scanner. 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 copy resolution of 600 x 600 dpi, a scan resolution of 300 x 300 dpi and a fax resolution 300 x 300 dpi. It has a print speed of 55 pages per minute with first page out in 9.5 seconds and a copy capacity of 55 copies per minute. The HP LaserJet Enterprise M4555f MFP has a 1,100 sheets total input capacity. It includes 1 x 100 sheets and 2 x 500 sheets media feeder. It has a maximum media capacity of 2,100 sheets. It's media types are transparencies, envelopes, plain paper, cards, labels, recycled paper, bond paper. It's media sizes are Letter A Size, Legal, Executive, A4, A5, JIS B5, Statement. It has a monthly duty cycle of 250,000 sheets. It also features automatic duplexing printing, 1280 MB RAM, ethernet, USB and ethernet connectivity. The HP LaserJet Enterprise M4555f MFP comes with a 1 year manufacturer warranty. HP LaserJet Enterprise M4555f MFP uses 90A and 90X black cartridge. Cartridge model numbers are CE390A and CE390X.