Referee whistle hygienic hand bulb

Training: This whistle is indispensable wherever it has to be used by different people as for example in sports classes where school children have to learn and practice refereeing activities. The pear whistle can also be used for dog training. Features: When the soft PVC part is squeezed, the air escaping passes through the whistle and produces a shrill tone. Hygiene: This referee’s whistle is absolutely hygienic, because the sound is produced by the built-in bulb. The bulb is made of hygienic PVC.