Set it and forget it. The last thing you need to worry about on the dive is your breathing system. The GT 3 puts you in total control with its patented Dynamic Adjustment feature. Whether you're snorkeling to your dive site or working a current on your favorite deep wreck, you can quickly adjust the GT 3to behave precisely the way you want, then let it do the work as it automatically readjusts with changes in depth.
Hose not included.