Tusas IR 3 Duo Air Alternate Air and BCD Inflator. A downstream backup regulator that also provides you with easy to operate buoyancy control. This unit is positioned at the end of the B.C. hose. Designed to replace a standard power inflator, the Duo Air Regulator is positioned at the end of the BC hose. Because you use it as your power inflator, you always know where it's located (which can be a priceless advantage in an emergency). Plus, the Duo Air cuts down on hose clutter by using the same hose to supply both the power inflator and the backup regulator. Fits all standard 1" diameter corrugated inflator hoses. Tusa Lifetime Warranty and Duo Air LP Quick Disconnect Hose included.