Toner Page Yield: 1,200 Drum Page Yield: 12,000 Shelf Life: 24-36 months per cartridge Contains a toner management computer chip system which allows each cartridge to communicate with your computer Compatible with Printer Models Dell E310dw Dell E514dw Dell E515dw Dell E515dn Color: Black The use of aftermarket replacement cartridges and supplies does not void your printer's warranty