Even with the best laid dive plans, there are times you encounter conditions beyond your control. The Delta 4 is one hot new regulator ready to take on all challengers with improved performance, new features, improved styling, and the new FDX-10 First Stage featuring DVT ( Dry Valve Technology).

1. Diver adjustable inhalation effort
2. Patented Dynamic Adjustment automatically maintains inhalation effort throughout the dive
3. Adjustable Venturi Switch (A.V.S.) for simple Dive/Pre-Dive Adjustment.
4. Paired with the new FDX-10 Over-Balanced Diaphragm First Stage featuring Oceanic's DVT (Dry Valve Technology)