Standard choice for personal safety and rescue professionals worldwide.
The harder you blow, the louder the sound! Reliable, flawless
consistent and penetrating sound. It will be heard above ambient noise,
the roar of engines, breaking waves and thundering gale-force winds. The
chambers are designed to self-clear when submerged in water. There are
no moving parts to freeze, jam or deteriorate.
Design: 3-chamber pealess