Single-tone electronic whistle suitable for police, lifeguards, teachers, referees, umpires, tour guides, sport trainers, cheerleaders, traffic guides, coaches, military training, dog handlers, rescuers or anyone caught in a situations that calls for its use.The fast-action push button response and loud 110dB sound stops play instantly.A hygienic solution for multiple users & also suitable and compact enough to be a keychain!

Features:
– Compact and stylish housing design.
– Especially suitable for children.
– Ultra light-weight design.
– High decibel of up to 110 dB.
– Handy and hygienic.
– Ease of use with a push of button provides a loud, clear, and consistent sound.
– Great for all sporting events.
– Use as a locator in emergency situations.
– Use as a safety alarm for crime prevention.
– Dimension: 9.5cm(L) * 1.6cm(D).
– 4x LR44 batteries and adjustable lanyard included.