Lexmark imaging unit for consistently outstanding image quality, with long-life system reliability. Innovative shake-free print system. The Lexmark Return Programme cartridges are patented devices sold at a special price subject to the restriction that the cartridge will be used only once. The customer agrees to return the imaging unit only to Lexmark for remanufacture and/or recycling. The Return Programme imaging units are designed to stop working after they reach their respected rated life. The imaging unit is designed to update the memory automatically in the printer to protect against the introduction of counterfeit and/or unauthorised third party cartridges. Replacement cartridges sold without these terms are also available.