Zerodis Referee Timing Pedometer Equipment Sound Holes 4000Hz High Frequency Adjustable Nylon Lanyard Lightweight Portable ABS Resin with Durable Design for Referee Teachers Training

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[Versatile Use] Ideal for a wide range of applications this whistle is perfect for referees teachers training sessions survival kits emergencies schools and sports events. its bulk packaging also makes it a great giveaway item for teams and organizations.
[Adjustable Nylany Lanyard] The whistle comes with an adjustable nylon lanyard that easily passes through the tail hole and is secured by double balls preventing it from falling or getting lost. this feature ensures convenience and reliability during intense sports activities or emergency situations.
[ Material] Made of highquality abs resin this whistle is not only but also to both hot and cold temperatures. its lightweight and portable design makes it easy to carry around for referees teachers and anyone in need of a reliable whistle.
[Durable and Reliable] Designed to withstand rigorous use this whistle is built to last. its sturdy construction ensures it can handle the demands of any sport or emergency situation while maintaining its crisp sound and functionality over time.
[Crisp Sound Design] This whistle features independent sound holes on both sides ensuring the sound spreads evenly across the court making it perfect for volleyball matches where referees are positioned in the middle. the treble frequency is set to 4000hz which is within the range that human ears are most sensitive to ensuring clear and audible signals during games.