1st.stage (R-300)
 Balanced diaphragm first-stage.
 Two H.P. ports and four L.P. ports.
2nd.stage (S-40)
 Breathing resistance adjustment knob
 Dynamic airflow hose
 Universal Swivel hose joint
 Ortho-consciously designed mouthpiece 

The RS-340 regulator is equipped with a swivel joint between the second stage and L.P. hose to minimize the pulling feeling. And in order to achieve natural breathing, a dynamic flow hose with a large inner diameter increases the airflow. The RS-340 always supplies the diver with stable air at any tank pressure or depth, delivering maximum breathing ease and comfort for the diver.     1st.stage Balanced diaphragm type first stage (R-300) The balanced diaphragm system features minimum variation in intermediate pressure in relation to changes in residual tank pressure. The ports feature left-right symmetry (H.P.x2, L.P.x4) for easier tank adjustments, even for beginners.	RS-350 DIN (Europe only) DIN Version is available in European markets. *Maximum working pressure is 300bar.
	2nd.stage Dynamic airflow hose A dynamic airflow hose with a large inner diameter increases air flow to the second stage.
Universal swivel hose joint   For optimum performance and comfort, a swivel joint is fitted between the second stage of the RS-340 and the joint section of the low pressure hose. The swivel joint allows flexibility of the hose for eliminate hose tension at the mouthpiece for a more natural and comfortable bite.    Ortho-consciously designed mouthpiece   Reusable mouthpiece cinch The new mouthpiece, developed on the basis of ergonomic engineering, further enhances the comfort of bite, fit, and stability. Even with a light bite, a high level of stability is achieved, so there is no fatigue from long periods of usage.    Breathing resistance adjustment knob Respiration rate and air consumption rate vary greatly while diving according to environmental conditions (water depth, current, etc.) as well as the skill and physical condition of the diver. A necessary condition for safe and pleasant diving is natural breathing in correspondence to the situation at any time. With the S-40 and the S-30 you simply rotate the flow adjustment knob on the side with its ideal click feeling for free control of the air supply volume according to your needs. The multiple thread screws allow speedy and fine adjustment in which you can appropriately sense resistance to exhaled air to a condition in which you feel almost no resistance.