This is the Aqua Lung Helix Pro Stage3 1st, 2nd, Octo Regulator Set  

What's included:

• Helix Pro 1st and 2nd Stages with Hose 
• Helix Pro Octopus with Hose 

1st stage

• ACD : Auto Closure Device
• Permanent Dry Chamber
• Blue high pressure seat

• Air channel deflector
• Cover opening channels
• Comfobite / interchangeable mouthpiece
• The Helix Pro octopus is pneumatically-balanced resulting in smooth and easy breathing.
• The easy-to-grip venturi lever prevents unwanted free flow at the surface while giving a performance boost at depth.
• A heat exchanger (patented) which surrounds the valve mechanism, dissipates the cold caused by gas expansion while drawing in the warmth of the ambient water.
• Includes 1m yellow hose and yellow front cover making it easy to locate in an emergency.

Just as DNA forms a helix, the HELIX PRO regulator is part of the DNA of our technical excellence. This balanced regulator offers the superior breathing performance you expect from Aqualung. Paired with the Helix Pro octopus, providing the same great performance.