Replaces Lexmark MS811DN 65 ppm, 1200x1200 dpi USB, Ethernet, Integrated Duplex Dual Core, 1000MHz, 512MB Memory Monthly Duty Cycle: Up to 300000 pages per month Up to 11,000pages Starter Return Program Toner Cartridge Compatible Toner Cartridges: 58D1000, 58D1H00, 58D1X00, 58D1U00