【Whistle Super Loud】:Our whistle has a natural cork pea in it. The pea cork is soft and flexible enough to whirl in the whistle, when you blow it, making the whistle clear sound louder.【Reliable Quality】:The whistle for coaches is made of premium Material that won't readily rust or corrode. Metal whistles are durable and sturdy than plastic whistles and don't discoloration. The surface of the whistle is smooth and comfortable to touch, making it safe to use.【Whistle with Lanyard】:Each referee whistle comes with a lanyard, which is made of nylon material, soft for long-time hanging in the neck and free your hands. You can adjust the yellow bead to control the length of the lanyard.【Wide Application】:These whistles are very practical and can be used not only for school sports and various competition training, but also for outdoor activities, hiking whistle, self-defense whistle, lifeguard whistle, emergency whistle, pet training whistle and other occasions.【Great Value Package】:You will get 9 pack metal whistles with lanyards, which are small and portable. Enough loud whistle can meet your different needs. Meanwhile, whistles are great gift for trainers, teachers, coaches and kids.