The Fox 40 Pearl is inspired by the world-famous Fox 40 Classic. The whistle is perfect for those who want to be heard above all the noises but also not make an ear-piercing shriek. The Fox 40 Pearl Whistle gives a clear blast of sound and is easy to blow. Its flawless design has no moving parts which doesn't make the whistle freeze, jam, or deteriorate. The Lower tone 90dB pitch is suitable for multi-field games like Soccer, Football, Rugby.