Powerful, rugged and reliable flat whistle. Made for the marine environment, from noncorroding, high-impact plastic. No metal parts. Two whistles per pack. Safety attachment lanyards included to keep whistle around the neck. Contains a small hole at the end to place on neck strap key rings and much more. Pocket size. A must for camping, hiking, fishing, backpacking, military personnel, public safety personnel, and law enforcement personnel.