Compact Sealed First Stage

• Sealed balanced diaphragm design makes for the ultimate compact first stage for cold water or contaminated diving conditions.

Effortless Airflow

• Air-balanced diaphragm delivers consistent and effortless airflow, regardless of depth, tank pressure, or breathing rate.

Environmentally Sealed Dry Chamber

• Dry chamber is completely environmentally sealed with a dual diaphragm system that keeps out contaminated water. The rib is designed to enhance heat exchange, making the first stage cold water-proof.

Optimized Hose Routing

• Two opposing high-pressure ports positioned on a 15º angle allow the first stage to be positioned either up or down, plus provide an optimal hose/transmitter layout.

Smooth Breathing Performance

• Air balanced second stage valve smooths out the inhalation effort at varying depths and supply pressures.

Rugged Second Stage Design

• Rugged reinforced technopolymer design features SCUBAPRO's largest second stage casing and diaphragm for the ultimate in breathing sensitivity, regardless of position in the water.

Extreme Cold Friendly

• • Metal components (inlet tube, orifice, inhalation control knob and hose connector) increase resistance to freezing when diving in extreme conditions.

Adjustable Breathing Controls

• A diver-adjustable inhalation effort knob fine-tunes air delivery to suit changing depths, water conditions and personal tastes, and a Venturi-Initiated Vacuum Assist (VIVA) dive/pre-dive switch prevents free flows in cold water or when used as an octopus.

High-Flow Exhaust Valve

• High-flow exhaust valve reduces exhalation for better overall breathing comfort, and the reversible hose attachment allows you to easily adjust hose routing for tech diving configurations.

Super-Flow Hose

• Super-flow hose features an oversized bore that allows more air to flow on each inhalation.