First Stage
* Over-Balanced diaphragm Auto-Closure Device (ACD) system.
* Environmental dry seal Air Turbo system.
* 2 high-pressure ports and 4 low pressure ports.
Second Stage
* Balanced Side'X deflector.
* The Dual Cam system.
* Diver-controlled Venturi Adjustable Switch (VAS).
* Built-in heat exchanger.
* A mouthpiece lip shield for warmth.
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