One of the basic pieces of scuba equipment that any diver should own--the regulator. Scuba regulators have one task and that is to deliver air to the diver at any depth. Every regulator is divided into two crucial stages: The first stage, which delivers compressed air from the tank through a hose to the second stage. The second stage has a mouthpiece that delivers air at ambient pressure on demand. A first stage that is "balanced" allows the diver to breathe easily at low tank pressures--eliminating the feeling of straining for your breath toward the end of your dive. Many second stages, like the Scubapro S600 and the Oceanic EOS have a diver-adjustable knob that fine tunes your breathing effort at every depth. Whether you are shopping for the Aqualung Legend LUX with all the latest integrated technology or the more modestly-priced Oceanic GT3/CDX5, Dolphinscuba.com has the regulator that will NOT take your breath away.