With this whistle, everyone will hear you! The FOX40 Official Classic is the most popular and best whistle in the world. Its loudness is approximately 115 decibels, and its distinctive sound dominates over street noise and in many other places. Did you know that as many as 90% of judges choose this model? The FOX 40 Classic is considered a true gem among referee models. Professionals... Coaches and physical education teachers in schools follow in the footsteps of the elite and are happy to purchase this whistle. Also as a safety whistle! Even uniformed services use this wonderful invention. In the US and Canada, it is used as a mountain safety whistle due to its loud sound. Parameters: • Volume: approx. +115 dB • 3-compartment design for easy gripping • No ball inside. Thanks to the INSIDE CHANNELS, the sound becomes MUCH MORE consistent and resonant, with virtually no effort on your part. • Included: original whistle string • Brand: Fox 40 Fox40 whistles are used by professional referees from the world's richest sports leagues and organizations, such as: NFL, NHL, NBA, FIFA, FIBA, NCAA, Euroleague and many, many others!