This demonstration video discusses and shows the features of the TUSA RS-680 Scuba Regulator. The Regulator is Nitrox Compatible to 40% (The Recreational Limits of Nitrox). It has a 360 Degree 2nd stage swivel to prevent jaw fatigue and add to overall comfort. Equipped with "Diver Adjustable" Airflow and a Venturi Adjustment lever, Built-in moisture exchange plate and a Lightweight 2nd stage to prevent jaw fatigue and add to overall comfort.