Model AA76140
The Vandalism and Anti-Social Behavior Prevention System (Mosquito) is a safe, non-violent, and non-confrontational bifunctional device for reducing vandalism, theft from and damage to property, and discouraging group anti-social behavior. The first function, for youth, emits a harmless directional high-frequency (17 KHz) sound that only young people (between the ages of 13 and 25) can hear and find annoying. The second function, for people of any age, also emits a harmless directional sound, but at a different frequency (8 KHz), which people of all ages can hear and will find annoying.