The tried and true RG2015 is a workhorse regulator and has performed admirably over the years. Pneumatically balanced, it is now our secondary octo of choice, making the entire Dive Rite line of regulators balanced for top performance regardless of depth or tank pressure. An adjustable Venturi lever and inhalation resistance knob allows the diver to fine tune inhalation effort and breathing resistance based on dive conditions or diver preference. CE EN250 approved.