This Emergency Safety Whistle has a loud 125dB, distinguishable dual note sound designed to frighten would be attackers and alert others for help. Features pealess design and adjustable lanyard. Great for children and outdoor enthusiasts.This emergency survival whistle is made of tough plastic to be virtually unbreakable and can be safely used in freezing temperatures. With its super light design and high decibel level output, this is a critical component of any emergency kit and vital to many outdoor activities for outdoor safety. No batteries required, the survival whistle can be vital life saving safety gear you should pack for every trip.