The 4PK Toner for HP 201X CF400X CF400A is a premium compatible product designed for use with various HP Color LaserJet Pro models. This multi-color toner cartridge includes cyan, yellow, magenta, and black colors, with a page output of 2,800 pages for black and 2,300 pages for color. It is compatible with printers like the M252dw, M277dw, and MFP M277n, and comes with a manufacturer warranty of 3 years. The toner cartridges are equipped with chips for easy recognition by the printers and are a reliable option for those looking to replace their current toner supplies.