3pcs Stainless Steel High-frequency Metal Whistle Outdoor Lifesaving Whistle Referee Sports Training Whistle

Description: 100% brand new and high quality Material: Metal A great attention getter! Durable and lightweight Ideal for outdoor activities, hiking, camping, pet chaining and emergencies Tip: Use three sharp bursts to indicate a call for help. Use two bursts to answer a call Specifications: Size: 4.5 x 1.8 x 2.1 cm Color:Silver Package Content: 3x Whistle Note: Please allow a little size error due to manual measurement. Thank you!