The Macintosh Portrait Display can be configured with the Macintosh II, the Macintosh IIx and the Macintosh IIcx.
The Macintosh II Portrait Display Video Card is required for use with the above computers. The Portrait Display Video Card comes with a 2-bit per pixel display (4 levels of gray).
The Video Card can be expanded with the Macintosh II Video Card Expansion Kit to provide a 4-bit per pixel display (16 levels of gray).