- Swivel Turret
- The 1st stage has 5 Low Pressure ports on a swiveling turret which allow the hoses to rotate around the first stage with the 5th port facing upwards. This gives added flexibility in hose routing prefered by many sidemount divers.
- The 2nd stage also features a swivel ball joint on the hose that reduces jaw fatigue
- Titanium Parts
- The internal mechanism of the 2nd stage uses the same Titanium parts as the T2 and B2 models which is stronger, lighter and has a greater corrosion resistance compared to brass or stainless steel parts.Peak Performance Air-Balancing System
- Automatic Flow Control
- The ST1 2nd stage features Atomic’s AFC system that automatically interrupts freeflows before they occur by using a flexible venturi system that redirects freeflowing gas back into the 2nd stage to equalise the pressure.