•Product SummaryProfessional-grade referee whistle with double-chamber design for powerful sound penetration.Durable ABS and titanium alloy build, ideal for football, volleyball, basketball, and more.
•Product HighlightsDouble Chamber Sound Design: Mixes 3.74KHZ and 4.10KHZ frequencies for loud, sharp sound.
•Durable Material: Made from ABS, titanium alloy, and polymer for strength and longevity.
•Includes Lanyard and Storage Box: Easy to carry and convenient to store.
•Ideal for Various Sports: Perfect for football, volleyball, handball, and basketball referees.
•Lightweight and Portable: Compact size for easy handling during matches.