PREMIUM MATERIAL: Our metal whistles are made of high-quality stainless steel, STURDY - not easy to bend and deform, LIGHTWEIGHT and COMPACT - total weight 13g/0.03lb, you can put it into the purse, handbag, pocket, keychain, etc, Will not cause a burden. Smooth edges, easy to long time use. QUICK OPERATION & COMFORTABLE LANYARD: Our whistle lanyard comes with a removable oval metal buckle, one second to take off or buckle the whistle if you want. The stainless steel whistle lanyard length is 40cm/15.75 inches, It is easy to go around the neck of an adult to use comfortably. Come with adjustable yellow round beads to adjust the lanyard length to suit more people. GETTING ATTENTION SOUND: Compare with similar whistle, our stainless steel whistle uses the cork ball, which can make it louder. The sound is loud enough to be quite effective in getting attention. Great to use for recess line up time, walk alone, Holiday party, cheerleading, cheering, etc. PACK of 5: This 5 pack Whistle is lightweight and small. Perfect for coaches, referees, officials, self-defense, school sports, gym, competition, emergency, lifeguards, animal trainers, and outdoors and parties. You can send it to your family, friends, etc. Try it Today.