Hearing is believing! You can't out-scream this whistle! Almost everyone, from small children to seniors, can benefit from JetScream's piercing shriek. This whistle is one of the loudest in the world. You can hear JetScream's amazing 122Db ear-piercing shriek above most natural or man-made noises. You can use JetScream in the city or woods for communication and personal protection. You don't need a big bulky whistle to make a loud blast and this sleek little device proves it!