Description Made of premium aluminum alloy with anti-oxidation surface, the whistle is solid and durable. With loud sound, it is suitable for outdoor sports, like hiking, camping, climbing, etc. Besides, it is also for daily excrcise, like pet training, football, basketball, soccer, hockey or others. With mini and portable size, it is easy and convenient to take it anywhere you want. Feature - Color: Random Color. - Material: Aluminum alloy. - Size: About 4.7 x 0.8 x 0.8cm/1.9 x 0.3 x 0.3inch. <div class="feature" id="businessOnlyItem_feature_div">- Made of premium aluminum alloy with anti-oxidation surface, the whistle is solid and durable. - Emergency survival. Suitable for outdoor sports, like hiking, camping, climbing, etc. It can be used to call for help if there is an accident. - Daily exercise. Suitable for pet training, football, basketball, soccer, hockey or any other exercises. - With mini and portable size, it is easy and convenient to take it anywhere you want. The key ring can be attached to a lanyard or a key.</div> - Lightweight but loud enough. The sound can be heard from far distance. - NOTE: The color of product will be delivered randomly.Packing list: 1 x set of 6pcs Aluminum Whistles Emergency Survival Whistles with Key Ring Chain for Referee Hiking Camping Climbing (Random Color)