A crisp, high‑pitched dual‑tone whistle with exceptional sound penetration—its dual tones deliver a powerful, piercing tone that can exceed 120 dB. Perfect for use as a referee’s whistle in competitive sports or as a reliable survival tool in outdoor emergencies.

Easy to print and requires no support structures.

A loud two‑tone whistle, ideal for sporting events and emergency signaling,producing an impressive ≥120 dB sound. Designed for effortless 3D printing without the need for supports.