Please visit, go to the Support Tab.  Hover on the Z1 & Z2 Resources, then click on CPAP User Guides and Software.  Scroll down to Qtube Guide and download the instructions.

To view the Qtube instruction guide, please visit and hover on the Support Tab.  Click on Software and User Guides, scroll to Z2 CPAP or Z2 Auto.  Scroll to the Qtube Insert, click on Download.