This demonstration video discusses and shows the features of the Cressi MC9 Ellipse Balanced Regulator. This regulator comes equiped with a "Diver Adjustable" venturi to prevent unwanted free-flow. The Regulator is Nitrox compatible to 40% (The recreational limits of Nitrox). The Cressi MC5 Steel Ellipse Regulator offers increased performance with less breathing effort and has a lightweight 2nd stage to prevent jaw fatigue and add to overall comfort. This Regulator is extremely easy to maintain and is designed for extreme depths.