First Stage * Over-balanced diaphragm. * Auto-Closure Device (ACD). * Environmental dry chamber. * Air Turbo System. * 2 high-pressure ports and 4 low-pressure ports. * Black polyurethane coating. Second Stage * Adjustable Balanced. * Diver-controlled Venturi Adjustment Switch (VAS). * Inhalation adjustment. * Built-in heat exchanger. * Exclusive Comfo-Bite mouthpiece. * Gold accent ring.
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