You cannot breathe directly out of a scuba tank because of the high pressure. A regulator reduces pressure to safe a level that can be inhaled by the diver. A diving regulator has two parts: the First Stage reduces the tank pressure and connects it to the Second Stage which contains the mouthpiece for breathing
The Prism 2 BOV is the newest accessory for your Prism 2 eCCR. It is a lightweight and high performance DSV (Dive Surface Valve) and regulator (BOV - Bailout Valve) in one which is a direct bolt on for your rebreather. The BOV is easily installed by replacing the standard DSV. A BOV is considered as basic safety equipment by many professionals. This BOV meets the requirements for training in Technical rebreather courses.
Patented Orthodontic Mouthpiece for comfort and reduced jaw fatigue
Single handed operation for both OC and CC operation
Brass locking rings provide weight for near neutral buoyancy
Easy grip controls for precise adjustment even while wearing gloves