The Omni Swivel Gas Switch Block allows a diver to change between two separate air tanks without having to remove their full face mask. The knob turns a full 180 degrees ensuring that there is no accidental switching during the dive. The knob pointing to the first position signifies that the air source closest to the outlet is in use.
Sonic Blast Underwater Horn
The horn works great under water. if you give it a quick push it kind of sounds like a duck quack bu ...