The Swim Secure Safety Whistle is a small but vital piece of kit that helps to draws attention to yourself or others in an emergency. It can be used when in the water or by anyone exploring the outdoors. It features an integrated clip attachment on the back which can slide onto clothing, bags or over the double layer in your tow float waist belt when out for a swim. When blown, the whistle produces a dual toned, 108 dB sound.