Like the Delta’s before it, the 5 comes standard with patented Dynamic Adjustment Technology, dive/pre-dive controls and a super comfortable orthodontic mouthpiece. Unlike it’s predessors, the new Delta 5 has an all metal pneumatic valve, providing super smooth breathing performance in any condition. We have also added a heat exchanger, positioned on the hose connection to the 2nd stage, to further increase it’s already stellar cold water performance. Oceanic paired the Delta 5 with the EDX. This top-of-the-line cold forged, over-balanced diaphragm first stage is environmentally sealed and comes with 4 low-pressure and 2 high-pressure ports. It also comes equipped with a heat exchanger for added cold water performance. Features: Delta 5 second stage Adjustments: Dive/pre-dive switch & patented dynamic airflow adjustment control Valve type: Pneumatically balanced all-metal valve Heat Exchanger: (For enhanced cold-water performance) Mouthpiece type: Orthodontic w/ Bite Tabs Nitrox compatible Optional swivel adapter Front Profile Dimensions: 2.5in circular Warranty: Lifetime & free parts for life Service Interval: 2 Year Satisfaction gauranteed: 30 days EDX 1st Stage Available in Yoke or DIN Balanced Diaphragm 4 LP Ports, 2 HP Ports Nitrox compatible Sealed Valve Design - Environmental protection Warranty: Lifetime and free parts for life 2 year service interval