[Product Content] You Will Receive 4 Whistles With Ropes.The Size Of Each Whistle Is 4Cm*2Cm, The Length Of The Rope Is 42Cm, And The Color Is Steel Whistle And Black Rope, Which Is Suitable For Sports Referees And Various Outdoor Activities. [Product Material] This Product Is Made Of Stainless Steel, Which Is Durable And Rust-Proof To Ensure Long-Term Use.The Rope Is Strong, Easy To Tie And Carry, And Is Suitable For Various Sports Environments And Outdoor Activities. [Professional Design] The Design Of This Product Is Simple And Practical, And The Steel-Colored Whistle Is Pronounced Crisp And Loud, Which Can Spread Clearly In The Crowd.The Black Rope Is Strong And Reliable, Easy To Wear And Access, And Enhances The Convenience And Comfort Of Use. [Widely Used] This Product Is Not Only Suitable For Sports Referees, But Also Very Suitable For Outdoor Activities, Camping, Hiking And Other Occasions.Whether It Is Football, Basketball Or Other Sports, These Whistles Can Meet Your Needs. [Easy To Carry] This Product Is Compact In Design, Light And Easy To Carry, And Can Be Easily Hung In A Backpack Or Pocket After Use, And Can Be Used Anytime, Anywhere.Whether It Is At The Game Site Or Outdoor Activities, These Whistles Can Provide You With Convenience.