Dive•Alert is a specially designed, small, lightweight air horn that uses quick-connect/disconnect hose fittings to become an integrated part of your BCD power inflator. Installation is easy and takes only a moment.
Dive•Alert does not require any modification of your equipment and it does not interfere in any way with the normal operation of your dive gear.
When you need to get someone's attention on the water's surface, you simply press a button and Dive•Alert uses a small amount of air from your scuba tank to make a piercingly loud sound.
DA1 fits most standard inflators.

DA2X fits SeaQuest Air Source, Oceanic Air XS, Mares AirControl, Zeagle OctoPlus and similar.
DA3X fits Tusa Duo-Air, Scuba Pro Air-2, Atomic SS1, Sherwood Gemini, Zeagle Octo-Z and similar.