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.