This works with the Hewlett Packard MIO (found on Laserjet 4 and newer). Comes with 1-Meg buffer but can be upgraded to 4-Meg using BAY-ZIP (2 BAY-ZIPs would make 1-Meg, it would require 6 of them in addition to the existing to get 4-Meg). The special 15 pin connectors require the L2261 to connect to a PC (cables can be made to any length needed).