This demonstration video discusses and shows the features of the Ideations Dive Alert Plus. The Dive Alert Plus is a Surface and Underwater Signaling Device. On the surface a blast of sound that can be heard up to a mile away. Great for getting your buddy´s attention underwater. Attaches between the power inflator and the low pressure hose. Installation is easy and takes only a moment. Specially designed, small, lightweight air horn. Uses a small amount of air from your SCUBA tank to make a piercingly loud sound.