This is the side panel for the PR System One 60 Series CPAP and BiPAP devices. The model is also compatible with the 50 series machines, although the color is slightly different. Respironics does not include a side panel when you purchase a 60 series machine and humidifier, so you'll need to purchase this if you intend to use your machine separately. The side panel snaps onto the same side of the machine as the tube connection piece.
Compatible with 50 Series and 60 Series
Side Panel Cover
For those who need a side panel cover, you have to purchase it separately from the machine itself.
Traveling with the System One
Will my machine work without the side panel?
It will, but if you're using it without your humidifier, you run the risk of damaging your machine internally.