Built to Blast FEATURES The Fox 40 Sonik BlastA(R) CMGA(R) has a distinct, loud and clear sound The Cushioned Mouth Grip (CMG)'s thermoplastic material provides superior grip and protection for teeth Ideal for those who need to hold whistle in mouth for extended periods of time No moving parts to freeze, jam or deteriorate Flawless, consistent and reliable The harder you blow, the louder the sound Easy to blow and cannot be overblown; the most efficient whistle in its class! Chambers are designed to self-clear when submerged in water Intensely clear sound - will be heard above ambient noise, loud crowds, the roar of engines, breaking waves and thundering gale-force winds Sound will be heard up to a mile away MODELS AVAILABLE With Breakaway Lanyard With Clipper Lanyard With Wrist Lanyard With P.T. System Lanyard Design: 2-chamber pealess + CMG Sound Power: 120 dB Clipper, Wrist and P.T. System Lanyards are only available with Black Whistles.