Premium Stainless Steel Referee Whistle – Leiyin Professional Series
Ultra-durable stainless steel body with precision-machined mouthpiece for sharp, high-decibel sound projection. Copper core resonator ensures clear, far-reaching tones ideal for crowded sports venues. Hand-polished smooth edges and anti-rust electroplating withstand extreme outdoor conditions. Ergonomic finger grip design allows quick-access during intense basketball/football matches or emergency drills. FIFA-approved acoustic frequency (3.5kHz±10%) penetrates ambient noise without distortion. Used by referees, coaches, and military trainers for tournaments, PE classes, and safety signaling. Wholesale exclusive – bulk orders receive OEM packaging and custom engraving. Factory-direct pricing with volume discounts for sports academies and event organizers.