You asked, we delivered. Based on the demands from divers and dive shops, Promate is proud to introduce this new pneumatically balanced diaphragm 1st stage for advanced divers and pro divers; those who rely on consistent and smooth airflows for greater performance. The four intermediate pressure output ports are mounted on a swivel base that helps divers adjust the hoses to the most comfortable position. The two high-pressure output ports positioned on each side of its main body can be connected to pressure gauge, dive computers or the hose-less transmitter.  Recommended 2nd Stage: OC350, OC300, OC450, OC400  Advantages: reliable; perfect regulator for extreme conditions  Users: tech divers, pro divers, frequent divers