Whats in the box:First & Second Stages, LP Hose First Stage
The environmentally sealed diaphragm ATMOS first stage is the ideal first stage for use in extreme diving conditions, such as ice diving or diving in high sediment situations. Critical seats and o-rings are isolated from the environment, helping to prevent internal corrosion and contaminant build-up, leading to performance that is more consistent. It is also recommended for those divers who simply want a high performance 1st stage with incredible features! Second Stage
This Pneumatically balanced, adjustable second stage is sure to provide you the highest performance for many years. The pneumatically balanced second stage provides the lowest possible inhalation effort. The second stage adjustment allows you to adjust your breathing effort, fine-tuning the regulator to your desired setting throughout your dive. The venture assist deflector vane directs airflow from the valve directly to the mouthpiece producing a smooth "venturi assisted" inhalation. Turning the venturi assist down, to a pre-dive position, prevents regulator free-flow while on the surface.