Pack contains 3 Fox 40 Sonik Blast CMG with Breakaway Lanyards 120DB Intensely clear sound - will be heard above ambient noise, loud crowds, the roar of engines, breaking waves, thundering gale-force winds, and up to a mile away Chambers are designed to self-clear when submerged in water Recommended for outdoor use The Fox 40 Sonik Blast CMG has a distinct, loud and clear sound. The Cushioned Mouth Grip (CMG)’s thermoplastic material provides superior grip and protection for teeth