The Delta 5 is the next step in a long line of remarkably reliable, durable and smoothly breathing regulators to carry that name. Sure, weve given it an updated look, but thats not all. Like the deltas before it the 5 comes standard with our patented Dynamic Adjustment Technology that, once set by the diver, provides consistent airflow at any depth. It also comes standard with a dive/pre-dive switch and a super comfortable orthodontic mouth piece. This latest edition though has an updated, all metal pneumatic valve providing super smooth breathing performance in any condition.