A three-chamber pealess whistle, this is easy to blow and provides optimised performance. Flawless, consistent and reliable - it has a sound power of 115 dB amd will be heard up to a mile away. Its integrated over-moulded Cushioned Mouth Grip (CMG) and integrated grip ribs along the top make it great to blow and to hold. The whistle also has an ergonmically designed shape to fit your hand better.