Product Information/Specifications:

How the PEEP flow controller works
The adjustable PEEP function is a simple device and easily operated by a medical professional, with the added benefit of double swivel connections at the mask and tubing ends.
The top (blue) controller rotates to increase or decrease PEEP pressure and its port (if occluded) instigates PEEP.
The PEEP control indexer offers a physical 'click' feedback when rotating. Both adaptor tube and mask connections offer double swivel connections.