1.Perfect durability: the sports whistles made of stainless steel impress with their highquality workmanship, rounded edges and firstclass materials. This stainless steel whistle is designed to withstand extreme conditions and produces a penetrating, clear tone even under the most demanding applications. Whether on the field or in emergencies, these adult referee whistles will never let you down. 2.Clear tone: thanks to the innovative twochamber design, this professional whistle referee whistle delivers a powerful, widely audible sound, ideal for attracting attention. Whether on the football field or in the sports hall – with the sports whistle for sports lessons you ensure clear signals. The sharp sound quality is reliably audible even over long distances. 3.Hands hanging: with the integrated lanyard, the referees whistle with lanyard the highest level of comfort. The soft material of the metal whistle with lanyard prevents skin irritation and allows for a long, comfortable wear. Experience effortless coaching while you can fully focus on the game action. 4.Small size: the whistle ideal for school sports is lightweight, compact and easy to carry. Perfect for coaches, referees or outdoor athletes. This whistle provides precise instructions in training, stores easily and easy handling ideal for quick use on the field or in emergency situations.