HP PSC 1610 2350 2355 Continuous Ink System WITH INK requires cartridges sold separately, The Continuous Ink System consists of a high capacity ink reservoir same as using between 5 8 ink cartridges per color that is attached to a cartridge via secure tubing. The tubing acts as a vacuum to extract ink from the reservoir and keep the cartridge full of ink. Because of the large reservoir capacity, you can print for an extended period of time without running low right away. There is a red line on the reservoir to indicate when it is time to refill. This system comes complete with easy to follow instructions, ink, and all accessories needed to successfully use the system. Note This system requires the user to have your own HP 94 HP 95 cartridges, which need to be installed onto the system instructions and tools are included. It is recommended that you install this system only with ORIGINAL HP cartridges. If you do not have a set of ORIGINAL HP cartridges, you can buy them separately from this website.