HyperWhistle The Original Worlds Loudest Whistle up to 142db Loud, Very Long Range, for Referee, Coaches, Instructors, Sports, Teachers, Life Guard, Protection, Self Defense, Survival, Emergency uses

Description

Worlds’s Loudest Whistle

SPL up to 142dB 8x louder than a common whistle

2 mile usable range

Anti-microbial composite, all-weather construction

Unique radial tri-frequency design

Naturally Buoyant

Works in all weather environments, including underwater

Patented Design US8925478