An excellent, reliable choice, this lightweight second stage regulator is the result of the evolution of the piston regulator. It has a sand-blasted finish for scratch resistance and a protection cover that is designed to allow for the installation of an RFID chip for rental use managed by dedicated PC software. It offers easy and reduced maintenance for INT and DIN version.Ultralight Techno Polymer: Abrasion resistant and affordable, ideal for diving in warm and moderate water temperaturesVortex Assisted Design (VAD) System: The air bypass tube sends air to the mouthpiece creating a swirling vortex with a low pressure area in the center that keeps the diaphragm down during inhalation, for very easy breathing at all depths. In cold water diving, this system prevents ice crystals (which can be generated by the expansion of humid air in cold temperatures) from interfering with the proper operation of second stage components.Dynamic Flow Control (DFC) System: Minimizes the pressure drop that occurs in all regulator first stages when the diver inhales. The deeper the dive, the demand from airflow from the regulator rises. The DFC system operates in relation to the diver's actual air demand, independent of depth and tank pressure. It uses the Venturi Effect, optimizing the regulator's sensitivity and minimizing inhalation resistance, especially during dives in extreme conditions.Fluid Dynamic Deflector: Receives and properly directs the airflow from the bypass tube to the mouthpieceMesh Grid: Patented design that reduces the impact of water flow onto the second stage diaphragm, thus eliminating free flows even in strong currentsFeatures:Material: TechnopolymerFirst stage: Piston designLightweight yokeFirst stage weight INT: 1 5/16lb.First stage weight DIN300: 1lb.Second stage weight: 3/8lb.Total weight INT: 2 3/16lb.Total weight DIN300: 1 13/16lb.Dry cold water kitHP Ports: 1 HP 7/16" UNF portsLP Ports: 4 LP 3/8" UNF portsInhale pressure: 11 3/8millibarInhale pos pressure: 0millibarExhale pressure: 9 5/8millibarExt work breathing: 1 3/8joules/literInhale work: 11/16joules/literPos inhale work: 0joules/literExhale work: