The Aqualung Helix Pro Scuba Regulator offers superior features and breathing performance and can operate in both warm and cold waters. The first stage is equipped was a patented auto closure device (ACD). The ACD system and the permanent dry chambers prevent water and contaminants from entering the inlets, which preserves the internal lubrication, thus lengthening the useful life and durability of the regulator. The second stage has air channel deflectors and cover-opening channels to direct air in ways that lower exhalation efforts, prevent freeflow, and reduce cracking pressure. Aqualung uses its patented Comfobite mouthpiece with a palate bridge to reduce jaw fatigue. Being environmentally sealed reduces the mechanism from freezing and remains clean and dry. In coldwater scenarios, the Aqualung Helix Pro Scuba Regulator has heat exchangers and a lip shield for added warmth. 

Aqualung Helix Pro Scuba Regulator Features:

• Balanced diaphragm 
• Automatic closure device
• Four medium pressure ports
• Two high pressure ports
• Nitrox compatible up to 40%
• Inhalation adjustment to control breathing effort 
• Venturi switch
• Comfobite mouthpiece
• Environmentally sealed
• Heat exchanger to avoid equipment from freezing 
• Lip shield for warmth