Here is a classic octopus rig for all you SCUBA divers.  I was a professional diver for the governmentfor some 20 years and currently teach one class at the University ofFlorida. 

This rig comes with both stages and has served my team wellwhenever it was called upon to do the job. It has a hose for an integrated BC,which you'll find in several other auctions. 

This rig has not been checked out for a couple of years, andbetween my age and unfortunate breathing issues, I no longer recreationallydive.

It has a gauges including a dive computer as well as a cum pus, all you need to go get wet.