EXTRA-LOUD SAFETY WHISTLE GETS ATTENTION! Originally developed by the U.S. Navy, this powerful whistle emits 102 decibels of piercing sound that can be heard at great distances. It even works when wet! Perfect for all kinds of emergency situations. Keep one in your car and take with you while camping, hiking, fishing or hunting. Whistle is 2-1/4" L and includes an 18" L lanyard.