Hewlett-packard LaserJet 2420 Laser Printer LaserJet 2420 Laser Printer Print Speed—30 ppm First Page Out—Less than 10 seconds Monthly Duty Cycle—75,000 pages Maximum Print Resolution—1200 x 1200 dpi Processor—400 MHz Standard Memory—32MB Maximum Memory—288MB Duplex Printing—Manual Standard Paper Input Capacity—350 sheets Connectivity (Cables Not Included)—USB, Parallel Compatibility—Windows® 98, Me, NT 4.0, 2000, XP; Mac® OS 9.x, OS X v. 10.1 and later Size—16-3/4w x 15-3/4d x 10-1/4h Manufacturer’s Warranty—One-year limited Replacement Cartridge—HEWQ6511A (sold separately) High-Capacity Replacement Cartridge—HEWQ6511X (sold separately)