Fox40 whistle with waterproof neck cord 9511FN. Very functional and comfortable neck cord that floats, using flexible tubing to ensure buoyancy. You no longer have to worry about losing your keys in a lake, sea, etc. The FOX40 Marine Micro whistle is an excellent tool for all coaches and physical education teachers. It is also used by rescue services and in sailing. FOX40 is a whistle used by referees in the NHL, NBL, NBA, NCAA, FIBA, FIVB. The FOX40 MICRO MARINE SAFETY has a sound power of 110 dB. It is a pea-less whistle, ensuring flawless performance in all conditions. Made from top-quality materials, it guarantees long-lasting and safe use. Available in various colors.