Sonik Blast CMG Fingergrip (+ FREE Referee Coin) Sound Power: exceeds 120 dB Design: 2-chamber/4 resonators; pealess Won't freeze, stick or jam Advanced science and technology makes this the most efficient, loudest whistle ever produced by Fox 40 Extremely easy to blow, the Sonik Blast cannot be overblown and emits sound power that exceed 120 dB