atures First stage AUTO CLOSURE DEVICE The ACD keeps the inlet shut to protect internal parts from debris and corrosive water when not connected to a cylinder valve. It helps to maintain oxygen compatibility, preserve internal lubrication, and keep the inlet filter clean and dry. This extends the life of the first stage between services. PERMANENT DRY CHAMBER Where there's no moisture, there's no ice. The Permanent Dry Chamber keeps internal parts clean and dry by isolating them from the outside environment. This enhances overall freeze resistance of the regulator when diving in cold water. OVER-BALANCED MECHANISM Also known as Auto-Balanced, the Over-Balanced Mechanism overcompensates the interstage pressure to reduce your breathing effort. Regardless of depth or tank pressure, it provides effortless breathing from the beginning to the end of your dive. This results in superior performance at depth. BALANCED DIAPHRAGM Provides superior and consistent performance. BLUE HIGH PRESSURE SEAT It is the core of the first stage. The Blue High Pressure Seat opens and closes with every breath, forming a perfect seal with durable materials that work in all conditions and with all gasses. The working pressure of the first stage is automatically elevated to counteract the increased breathing air density. DUST CAP PROTECTION Attached to the regulator body, the Dust Cap protects the inlet fitting and the Auto Closure Device from impacts and damage. It also seals the first stage when it's off the tank. HP/MP PORTS HP and MP ports and "T" Shape o 2 HP ports (7/16”) and 4 MP ports (3/8”) perfectly oriented in a “T” shape for streamlined hose positioning