PRODUCT DESCRIPTION CASEWIN 7 PACKS PLASTIC & 1 PACK METAL STAINLESS STEEL WHISTLES WITH LANYARDS For A Variety of Situations It's suitable for coach, referee, gym teacher, recess worker, lifeguard and etc. Also it can be used for running or walking at night, protection from dogs? It will be tool calling for help when you are in the event of an emergency. �Easy to Use and Carry Each whistle includes a lanyard which makes it easy to carry, store, and keeps it securely in place while wearing during any activities like coaching, refereeing, or lifeguard. � Specifications Material: Plastic / Stainless Steel Lanyard: Nylon Weight: Metal Whistle - 15g / 0.5 oz; Plastic Whistle - 10g / 0.3oz Size: 1.65" x 0.78" x 0.6" / 4.2 * 2.0 * 1.5cm Sound: Crisp and Clear PLASTIC MATERIAL:Made of high quality plastic,not easy to break,durable to use. 8 PACKS SET:8 different color whistles are included in this whistle set,and their colors are black,blue,yellow and red. LOUD VOICE:You can make this whistle make a big and crisp sound without a lot of effort. NECK LANYARD:With the neck lanyard,you can hang the whistle on your neck instead of holding on your hand,to free your hands. MULTI PURPOSE:This is a whistle for many people and events,like team coach,referee,outdoor activities lovers.And you can use this at sports matches like football or basketball,outdoor survival or pets training.