Genesis Prana Regulator Features Genesis Prana Regulator: Steeped in Tradition of GS2000 Regulator Delivers On Expectations Around-the-World for:Breathing PerformanceDurability, Longevity & Styling Top Performing Regulator Designed to Perform In Wide Variety of Extreme Conditions Innovation At-Its-Best Nitrox Compatible to 40% Oxygen Out-of-the-Box 3/8" Threaded Low Pressure Hose Owner's Manual First Stage: Genesis DAD Incorporates Genesis Patented Dry Air Demand (DAD) Keeps Intricate Components Clean and Contaminate Free No Messy Oils or Grease as with More Sophisticated Designs Environmentally Sealed w/o the Mess! Seals-Out Sand, Silt, Salt and Chlorine Contaminates Less Maintenance Mechanically Balanced Flow-By Piston Flow-By Piston: "Fail Safe" Mechanism Excellent Breathing Characteristics at Full or Low Cylinder Pressures Marine Grade Chrome Plated Brass for Long Life and Durability Two 7/16" Threaded High Pressure (HP) Ports Four 3/8" Threaded Low Pressure (LP) Ports High Capacity Inlet Filter for Smooth Delivery of Air to Second Stage Second Stage: Delivers Air Effortlessly Venturi Pre-Dive/Dive Switch:Eliminates SensitivityGreat for Swimming Thru-Surf, Jumping-Off Back of Boat, or Fining in CurrentAllows High Performance Breathing when Needed Non-Corrosive Plastic Housing Single Valve Tube Construction Provides Precise Channel for Poppet Travel Breathing Resistance: Adjustable for Optimal Resistance 2'nd Stage Automatically Compensates for Changes in Ambient Pressure Smooth and Easy Breathing from Start to Finish of Dive Injection Molded Thermoplastic Rubber (TPR) Seat:Harder than Silicone SeatsMaintains Its ShapeDoes Not Coin as Deeply Orthodontic Mouthpiece: Reduced Jaw Fatigue