Product Contents: This package includes 6 whistles for coaches accompanied by a lanyard. The dimensions of the sports whistle are 1.7 inches in length, 0.7 inches in width, and 0.4 inches in height. The lanyard measures approximately 15.3 inches, making it highly portable and convenient for users to carry. Loud Crisp Sound: The whistles for adults are equipped with cork peas that oscillate at a high frequency, generating a remarkably louder sound. In a brief moment, it can achieve a volume of 120dB. Compared to conventional whistles, it demands less effort in breathing. The whistle has a bold, crisp sound that can attract attention in noisy environments quickly. Premium Material: The referee whistle is made of solid stainless steel. In contrast to ordinary plastic whistles, this whistle is highly to rust and , ensuring its safety during use. Regardless of the frequency or manner of its use, there is no need to be concerned about it suffering any breakage. Equipped with a Black Lanyard: The whistle for teachers comes with a removable black lanyard. The lanyard is made of soft nylon material, allowing you to conveniently suspend the stainless steel whistle around your neck. There is also a plastic ball on the lanyard that can be adjusted in length to meet your wearing needs. Wide Applications: The loud whistle can be used for competition training, football games, pet training, emergency situations, directing traffic, hiking, travel, teaching, fans cheer. Whistles for coaches can also be used for coaches, referees, teachers, police, officials, lifeguards and so on. Quantity:6PCS Colour:Silver Material:stainless steel Package Contents: 6 * whistles Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.