A:AnswerThe HP 65 tri-color ink cartridge has 3 separate chambers inside for Cyan, Magenta, and Yellow ink. The HP printers use a technology called "active ink balancing". The technology dynamically responds to ink levels and optimises the color mix while producing high-quality output on plain paper. This helps you get the most mileage from every cartridge. The goal is to use the inks so that they deplete as evenly as possible.
A:AnswerIt's probably because it's a brand new printer and they haven't updated the list. I checked the official HP data sheet, and it is Instant Ink compatible. If it's not letting you register the printer, the Instant Ink support team should be able to solve the problem for you.
