Featuring a scientifically designed dual resonance chamber, the whistle produces a loud and clear sound, ensuring calls are clearly heard on the field. Made of high quality stainless steel, this whistle is durable, hard-wearing and reusable, lasting longer than traditional whistles. Compact in size and lightweight, this whistle allows you to easily attach it to your key ring or hang it around your neck, making it virtually impossible to lose. With a separate lanyard, the whistle is also easy to carry so you can take it with you wherever you go. Comes with a portable storage box. Perfect for referees in sports such as basketball and soccer, and ideal for outdoor activities such as camping and hiking. Description: Introducing the whistle Pro - a durable stainless steel whistle designed for ultimate convenience and functionality. Made to last, this whistle is wear-resistant and reusable, ensuring a longer service life compared to traditional whistles. Its portable design allows you to easily buckle it on a key ring or hang it around your neck, making it virtually impossible to lose. The whistle Pro features a scientific double resonant cavity design that produces a loud and clear sound, perfect for referees in sports like basketball and football. Additionally, it is ideal for outdoor activities such as camping and mountain climbing. Included with the whistle is a separate lanyard for easy carrying, so you can have it with you wherever you go. The whistle is stored in its own independent storage box, making it easy to keep track of and take with you on the go. Don't settle for an ordinary whistle - upgrade to the whistle for superior performance and convenience in any situation! Item Name: Whistle Material: Stainless Steel Features: Loud Sound, Falling Resistant, Portable Size Size Details: L: 6.6cm, W: 2cm(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Whistle 1 x Lanyard 1 x Storage Box