Trident Acou-stik

The Acou-Stick Underwater Noise Maker is patented technology used by divers, Dive Masters, and Scuba instructors worldwide. Get your dive buddy's attention fast and easily just a simple shake sends sound up to 100' (30 meters)! No batteries or maintenance required! Unlike simple "rattling" devices, the Acou-Stick Professional Underwater Communicator stays silent while swimming and when stowed in dive gear or luggage. It only works when you want it to!