The Lifesystems Mountain Whistle is an essential piece of kit for those who are heading into the outdoors. The whistle is made from an anodised aluminium alloy that is both light and durable. It can reach up to 100db, ideal when you need to make yourself heard. The keyring attachment makes it easy to store and carry so you won't lose or forget it.Anodised aluminium alloy - tough and lightweightKeyring attachment - prevents you from losing itLoudness: 100dB - make yourself heard to those in the distanceDimensions: 12x12x60mmWeight: 11g