Made of PVCmaterial, the whistle is solid. With loud sound and hand squeeze design, it is suitable for outdoor sports, like hiking, camping, climbing, etc. Also for daily exercise, like pet training, football, basketball, soccer, hockey or others. With portable size, hanging keychain ring decor, it is easy and convenient to take it anywhere you want. Features - Color: As Shown -Material:PVC - Size: 11.00X6.50X6.50cm/4.32X2.55X2.55in -Bright color design, small and adorable, it is also a lovely and delicate pendant for you. -No matter you are a referee outdoor activities fan, and you need a whistle, then our hand squeeze whistle will be your good choice. -In addition, it can make a loud, crisp sound by hand squeeze. You can use it easily and effectively in any situation. -Adopted of good material, leaving it looking shiny and new and can be used in various occasions. -Multi-use in sports occasions or outdoors activities, great gift for your teachers or families. Packing list2 x Hand Squeeze Whistles