Package Content: You will receive 8 pieces of 51x21x17mm (2x0.8x0.7 inch) sports whistles in 8 colors: black and red. Suitable for various needs. Please check the size before purchasing. Premium Materials: The whistle is made of high-quality ABS plastic, lightweight and odorless. It is easy to carry, durable, and not prone to breaking, making it easy to clean and reliable for long-term use. Easy to Use: Each sports whistle comes with a soft nylon cord measuring 44.5 cm (after folding), allowing hands-free use and convenient neck hanging. Loud Sound: These sports whistles produce a loud sound without the use of a pea whistle core, offering a longer service life. Keep away from children when not supervised, as small parts may pose a choking hazard. Widely Applied: These whistles are practical for use in sports, coaching, training, hiking, pet training, lifeguarding, and other outdoor activities.