The R095 OCTO is an economical second stage featuring classic downstream valve technology that has a well-earned reputation for safety and reliability. Designed to be extremely easy to use in an emergency, the R095 OCTO is pre- tuned to the optimum inhalation volume for safe and uncomplicated use. You never have to worry about control knobs or switches; simply put it in your mouth and breathe. The R095 OCTO comes with a high-visibility yellow purge cover and a 39in/1m yellow hose that makes it that much easier to share air with a buddy in need. It's also a versatile second stage for use on deco tanks, thanks to its reversible hose attachment feature.