Top features: - Fast and affordable ink with HP's Instant Ink service - Automatic cartridge replacement with £24 credit Fast and affordable ink Find a more economical, efficient way to print with this HP 62 Instant Black & Tri Colour Ink with HP Instant Ink Enrolment.HP's Instant Ink is a quicker and more affordable way of getting ink for your printer. All you need to do is enrol online at hpinstantink.co.uk and load your compatible HP printer with the ink refill cartridges. The Instant Ink service will start as soon as the cartridge is loaded into your printer and your enrolment is complete. Because the Instant Ink service is based on how many pages you print and not the amount of ink, you can print both full colour photos as well as black and white documents without having to worry about ink levels. Automatic cartridge replacement HP's Instant Ink Cartridges hold more ink than standard cartridges, so you can print photos and more without needing to replace as often. When new ink is needed, your printer will automatically make an order for replacement cartridges, so that you never run out of ink and never have to order any new cartridges. As well as the two cartridges, this set includes £24 of Instant Ink credit, which can provide up to a year of Instant Ink service, depending on your usage and the price plan you choose.___________________________________________________________________________Compatible with selected HP Printers that are Instant Ink ready - HP Envy 5540, 5640 and 5740 series printers & HP Officejet 5740 series printers.