Official referee whistle. The Thunderer 58.5 Whistle is the #1 choice for professional referee’s the world over, and would undoubtedly serve admirably at training for coaches of all levels.
The 58.5 is a solid brass pea whistler with tapered mouthpiece. The medium-to-low pitch sound is commanding and noticeable. The ease of use on the Thunderer 58.5 whistle is unrivaled, making it perfect for gaining attention or control of match on the fly.