Cool Toner Compatible Toner Cartridge Replacement for HP 78A CE278A Toner HP Laserjet P1606dn 1606dn HP Laserjet M1536dnf 1536dnf MFP HP Laserjet P1566 P1560 Toner Cartridge Printer Ink (Black,4-Pack) HIGH YIELD - Cartridge Yield: 2,100 pages (Letter/A4) SUPPORT - Advanced technology ensures stunning performance SERVICE - Phone Services for technical support WARRANTY - 3-Years Warranty; Replacement or Refund upon request MODEL - Compatible Printer Model --- HP LaserJet P1606DN, HP LaserJet M1536, HP LaserJet MFP M1536DNF, HP LaserJet P1560, HP LaserJet P1566, HP LaserJet P1606