North Wolf Houqiang Super Large Volume Referee Whistle
Premium pure copper body with true gold plating for unmatched durability and corrosion resistance. High-precision plug-in toning mechanism ensures crisp, powerful sound projection up to 120dB—ideal for sports referees, coaches, and emergency signaling. Ergonomic mouthguard design with anti-slip grooves for comfortable extended use. Precision-machined metal airflow channels deliver consistent pitch (065 tuning) without distortion. Weatherproof construction performs flawlessly in rain, extreme heat, or cold. Used by professionals in soccer, basketball, track events, and lifeguard training. Bulk orders available for tournaments and institutional buyers. Ships globally with wholesale pricing—no minimum order.