The Fox 40 Mini CMG is a more compact version of the Fox 40 Classic CMG with a smaller mouthpiece No moving parts to freeze, jam or deteriorate Produces a high-pitched, ultra-shrill tone 3-chamber pealess design with Cushioned Mouth Grip (CMG) Lanyard purchased separately The Fox 40 Mini CMG is a more compact version of the Fox 40 Classic CMG with a smaller mouthpiece. The Cushioned Mouth Grip (CMG)s thermoplastic material provides superior grip and protection for teeth. Produces a high-pitched, ultra-shrill tone. 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. Chambers are designed to self-clear when submerged in water. Will be heard above ambient noise, loud crowds, the roar of engines, breaking waves and thundering gale-force winds.