Package Content: Package includes 6 pieces stainless steel whistles with lanyards. Ideal choice for referees, coaches, teachers, school, sports, officials, etc. Materials: The sports whistles are made of stainless steel, sturdy, durable and long lasting. Our whistle lanyards are made of nylon, not easy to wear and durable. There are 2 colors of lanyard, yellow and black, to meet most people's preferences. Loud Whistles: These coach referee whistles have a loud and crisp sound that you can use effectively in any circumstance and can quickly attract crowd attention whenever you want. Convenient and Portable: Each coach whistle comes with a lanyard, easy to use, you can hang it around your neck, helping you free your hands. Widely Uses: Stainless steel whistles suitable for most indoor or outdoor sports activities, such as hiking, boating, camping, hunting, emergency survival, rescue, competition, etc.