SHERWOOD SCUBA Gemini Alternate Air Source & BCD Inflator Combo - All-in-One Diving Regulator for Scuba Gear | Perfect for Emergency Air Sharing & Buoyancy Control Underwater

I formerly used a SCUBA Pro Air 2. The Gemini is a acceptable substitute and performs well. I much prefer an inflator regulator to an octopus if for no other reason than streamlining. I have a Sherwood Magnum primary and, although known for being extremely easy breathing, it will free flow unless the resistance is turned down. I was concerned there might be a similar issue with the Gemini but after more than a dozen dives, it hasn't free flowed once. I like the button arrangement which makes it extremely easy to distinguish the power and manual inflate.