Use this chip resetter to reset our compatible chips for HP printers and keep on working with your cartridge. Please Note: It will not reset an original HP cartridge chip. Compatibility: HP No 10, 11,12, 13, 82, 84, 85, 88, 18, 38, 70, 72 cartridges Specification: HP No 10, 11,12, 13, 82, 84, 85, 88,18, 38, 70, 72 cartridges all have small chips on the side of the cartridge which prevent them from being recognised in the printer once they have been refilled. Unfortunately the original HP chips are not resetable, but we now have a solution to this - a resettable chip. Each resettable chip is unique to the specific color cartridge. Once you have the resettable chips you can use our HP Chip Resetter which can reset the chips back to full status unlimited times. Remember this chip resetter only resets, MacroEnter's resettable chips. It would not reset any other company's chips.