This demonstration video discusses and shows the features of the Aqua Lung Calypso Scuba Regulator. The regulator is Nitrox Compatible to 40% (The Recreational Limits of Nitrox). A lightweight 2nd stage to prevent jaw fatigue and add to overall comfort. It has a "Diver Adjustable" venturi to prevent unwanted free-flow. This regulator is rugged, reliable and affordable with exceptional dependability and also includes a Comfo-bite mouthpiece which eliminates jaw fatigue.