The G250V uses SCUBAPRO'S Air-balanced valve technology. The air-balanced valve technology of SCUBAPRO's second stages features a balancing chamber in the second stage mechanism, slightly offsetting the force of the downstream air entering from the first stage. This allows reduced spring tension and decreases the inhalation resistance to the lowest possible level. The result is super smooth breathing in all conditions. Diver adjustable inhalation effort, this feature enables the diver to adjust breathing effort via an oversized control knob; it is available on the G250 second stage. Another SCUBAPRO patented feature, the Venturi Initiated Vacuum Assist (VIVA) is available on the G250V second stage. VIVA uses the power of a vacuum assist to reduce work of breathing and increase breathing comfort. A VIVA in MAX position gives powerful breathing support on every single breath; a VIVA in MIN position helps to prevent free flow on the surface, for training, for buddy breathing, in currents, or when used as an octopus.
SCUBAPRO uses a comfortable orthodontic mouthpiece on every second stage to reduce jaw fatigue and gum irritation. It was developed by dentists and dental laboratories and lasts longer than any other mouthpiece, because only a minimum effort is needed to hold it comfortably in place. Internally the G250V has a full metal valve housing for strength and durability and comes equipped with SCUBAPRO's 3/8" threaded Super Flow Hose. The second stage regulator weighs 9.6 oz (272 g), and is covered by a limited lifetime warranty.