Powered by air from the BCD. It works on the surface, producing a very loud sound of about 130 decibels.
Traditionally, scuba divers have relied on whistles as the only signaling device when surfacing. But if the diver is disabled and cannot blow the whistle, the whistle will not sound at all. It is equally frustrating (and dangerous) that if a diver needs to attract the attention of someone who is too far away to hear the whistle, the whistle will not help. In contrast, Dive Alert allows divers to generate a burst of sound at the touch of a button that can be heard up to a mile away! Dive Alert is a specially designed small and light air sound that fits between the inflator and the air hose and becomes an integral part of your inflator. Installation is simple and takes just a minute. Dive Alert does not require modification of your other equipment and does not interfere in any way with its normal operation. When you need to draw someone’s attention to the surface of the water, you simply press a button and the Dive Alert function uses a small amount of air from your scuba to emit a high-pitched 132 dB sound. Suitable for all standard inflators