Blue Referee Whistle with Ball Chain - Sports & Coaching Equipment #312319 (License: Personal Use)

This illustration depicts a bright royal blue plastic whistle designed for high-visibility use in sports officiating and coaching. Featuring a pealess internal mechanism for consistent sound and a secure metal ball chain for easy attachment to lanyards or uniforms. Its ergonomic shape ensures comfortable grip and reliable performance during intense gameplay or training drills.

Used on sports equipment websites, coaching resource pages, or e-commerce product listings; targets referees, PE teachers, and team coaches seeking durable, audible signaling tools.