This whistle delivers a loud, crisp tone designed to meet the demands of coaches, referees, and officials in football, basketball, and volleyball contexts. Its multifunctional, lightweight, and portable attributes make it an indispensable outdoor accessory for training and outdoor supplies, offering dependable performance in various scenarios. Specifications: Net weight: about 18g, Product size: about 2x4.5x1.8cm/0.79x1.77x0.71 inches. Packing List: 1* Coaches Whistles. Note: Due to different lighting and screen settings, the item color may be slightly different from the picture. Due to different manual measurements, please allow a 1-2cm difference in size. Features an engineered sound chamber that amplifies audio clarity, achieving strong sound penetration and crisp, loud tones up to 120 decibels for dependable long-distance signaling.