Oceanic Delta 4 regulator $749

Delta 4 Second Stage - Features a venturi valve to allow you to adjust your breathing effort to fine tune your reg. Delta 4 also incorporates a 'dynamic adjustment' feature that automatically readjusts inhalation effort you set at the surface so it remains the same at any depth of your dive. Nitrox compatible to 40%. CDX5 First stage - A high performance balanced diaphragm first stage, the CDX5 comes with environmentally sealed making it perfect for diving in any conditions. Its tough rubber boot protects the first stage from external damage.