Electronic Pocket Whistle
120 db whistle. 4 inches long. Uses 4 LR44 batteries (included)

You don't even have to blow this compact pocket whistle... just push a button. Emits a loud 120 db whistle for as long as you push the button. Useful in various situations such as sporting events, a locator in emergencies (earthquakes, collapsed buildings), referee whistle, traffic use for police, military training, dog handling and as a safety alarm for crime prevention. Measures just 4 inches long and uses 4 LR44 batteries (included).