Aquatec "ScubaAlert" Signaling Device

Aquatec "ScubAlert" signaling device.  This is intended to be used underwater to get the attention and communicate (or annoy) you dive buddies.  Great for instructors to keep students paying attention.  This unit is intended to work with a standard LP inflator hose/BCD inflator.... it WILL NOT work with alternate air sources like the AIR 2 or SS! or similar.