High-power speaker design, loud and penetrating sound, clearly audible even in noisy environments

Multi-functional compatibility, specially designed for ball games, usable for referee whistles, timeout announcements, foul warnings, and end-of-round reminders

Rechargeable design, long battery life and strong endurance

Simple to use, ready to use right out of the box, sensitive button controls, rapid response, and instant sound upon pressing

Solid build quality, durable and portable, with a sturdy and drop-resistant body