Crafted for sports enthusiasts, this whistle set is ideal for training sessions and official matches. The high-volume sound that players and can hear it clearly. Its durable construction ensures performance, while the finger ring design provides comfort and ease of use. Features -Color:Assorted Color -Material:ABS -Size:9.00X5.00X2.00cm/3.54X1.97X0.79in -Clear and loud sound: dual tone design ensures the whistle is heard clearly, making it for outdoor sports and emergency situations -High volume for control: specifically designed for referees, the loud whistle sound helps maintain control in noisy environments -Secure ring wear: comes with for secure wearing, preventing loss during intense games and ensuring uninterrupted play -Multisport application: ideal for basketball, football, volleyball, and more, catering to a wide range of outdoor sports -Portable convenience: lightweight and compact, it can be easily carried in a pocket or attached to a backpack for use Package list: 4 x referee whistle