Dive Alert-Plus is a specially designed, small, light weight air horn that uses quick-connect/disconnect hose couplings to become an integrated part of your power inflator, breathable/inflator and buoyancy compensator. Installation is easy and only takes a moment. Dive Alert-Plus does not require any modification of your other equipment, and it does not interfere with the normal operation of your other equipment. Dive Alert-Plus enables divers to signal both above and below the water’s surface.