2 paper trays 2 Laser technology Laser HP LaserJet 9000n, Laser, 600 x 600 DPI, A3, 50 ppm, O, Network ready HP LaserJet 9000n. Print technology: Laser. Number of print cartridges: 1, Maximum duty cycle: 300000 pages per month. Maximum resolution: 600 x 600 DPI. Maximum ISO A-series paper size: A3. Print speed (black, normal quality, A4/US Letter): 50 ppm, Duplex printing: O. Network ready. Product colour: White http://www.zdnet.com/reviews/printers-and-mfds/2001/07/16/hp-laserjet-9000dn-10000107/ An excellent high-speed network printer, but be prepared to add extra memory and paper trays.