Fox 40 Pearl Whistle Black 9700-0008 Properties: The Fox 40 Pearl whistle is the perfect solution for matches where several games are taking place simultaneously. A great choice for young referee aspirants. The product is light and comfortable to hold. Whistle in black. Technical data: · easy to use · reliable and unique sound · audible above ambient noise · sound power: 90 dB;Fox 40 Pearl Whistle Properties: A whistle with a unique sound, made of plastic. Perfectly audible both on the pitch and during outdoor events. 90 dB