Professional-Grade Dolphin Port Mass Pass Whistle by August AOPI
Crafted from high-density ABS plastic for crisp, far-reaching sound projection, ideal for referees and coaches in football, basketball, and volleyball. Precision-tuned dual-frequency chamber ensures distinct tones for quick decision-making under high-noise conditions, compliant with international sports standards. Ergonomic lightweight design (45g) with non-slip grip, tested for endurance in outdoor tournaments and training sessions. Dutch-engineered air valve reduces lip fatigue during prolonged use, trusted by professional leagues for its 120dB audibility range. Bulk-order optimized for teams and sporting goods distributors, shipped globally with wholesale pricing.