120+ Decibels of high pitch Shrill rises above ambient Noise and can be heard over a Mile away * 100% constructed of high-impact ABS plastic-So they"re 100% impervious to Moisture * Pealess Design, No moving Parts-nothing to obstruct Sound, nothing to jam, break or freeze * Ideal for large Crowd Areas such as Football Stadiums, Motorsport Race Tracks, Airport Runways, Cons * Fox 40 cannot be overblown-the harder you blow, the louder the Sound