The R-400 First stage features a balanced diaphragm system and upgraded HP poppet assembly for enhanced reliability. This balanced diaphragm system maintains minimum variation in intermediate pressure in relation to changes in residual tank pressure. The first stage features two high flow low-pressure ports to optimize second stage performance for easier breathing.
The S-60 second stage features a diver adjustable sensitivity control to deliver air smoothly with each breath. The exhaust valve features a large and flexible design for extremely low exhaust resistance.