Molten DEEVO® Professional Volleyball Whistle – Dual Frequency, 125 dB, Made in Japan

The Molten DEEVO® whistle is a premium-grade whistle crafted specifically for professional volleyball referees. Inspired by the deep, resonant call of the blue whale, the DEEVO® is designed to cut through crowd noise and project in all directions, ensuring it can be heard clearly throughout indoor arenas.

Its distinctive sound—sharp, rising, and attention-grabbing—is produced by the interference of two frequencies (4.10 kHz and 3.74 kHz), giving it a unique and powerful tone that instantly stops play. The innovative fin-shaped design disperses sound evenly, making it audible on both sides of the court while reducing acoustic strain on the referee.

This high-performance whistle is elegantly packaged in a custom box with an informational leaflet and includes a matching lanyard. Used in international competitions such as the U21 Men’s Volleyball Pan American Cup and NORCECA Confederation Championships.

✅ Key Advantages:

• ✔️ Designed specifically for volleyball referees

• ✔️ Sharp, clear, rising tone – pierces through crowd noise

• ✔️ Innovative fin structure – disperses sound evenly across the court

• ✔️ Comfortable sound projection – minimizes impact on the referee's ears

• ✔️ Built from titanium core and soft-touch polycarbonate casing

• ✔️ Dual frequency design: 4.10 kHz & 3.74 kHz (4 octaves)

• ✔️ Extremely loud – 125 dB at 10 cm

• ✔️ Comes with a lanyard and premium box

• ✔️ Made in Japan – precision manufacturing and patented design

🎯 Recommended Use:

• Professional volleyball refereeing in indoor arenas

• Suitable for national and international competitions

• Ideal for games with large crowds where sound clarity and strength are essential

⚙️ Technical Specifications:

• Product: Molten DEEVO® Whistle

• Use: Volleyball referees, indoor arenas

• Frequencies: 4.10 kHz and 3.74 kHz (4 octaves)

• Volume: 125 dB at 10 cm

• Construction: Titanium frame, enclosed in soft polycarbonate shell

• Sound: Constant, sharp, uniform, omnidirectional

• Fin design for sound splitting and clarity

• Lanyard: Included

• Packaging: Custom presentation box with product leaflet

• Origin: Japan