Fox 40 Classic - Gold 115 Decibels of high pitch shrill rises above ambient noise-can be heard up to a mile away 100% impervious to moisture - perfect for snowmobiling, wilderness & general outdoor activities Pealess Design, No moving parts-nothing to obstruct sound, nothing to jam, break or freeze First choice of; NFL, NCAA, NBA, CFL FIBA and FIFA The whistle is designed to be heard above crowd noise, breaking waves & thundering gale-force winds