Once I told you about a device that was being designed at that time specially to shun off teenagers from places where they ought not to be. So teenagers I've got a bad news for you that it's finally ready.

It's known as Sonic Teenager Deterrent and sends out ultra high-pitched 80-decibel of irritating sounds that can be heard only by those less than 20 years of age.
The sound is so discomforting that the teenagers cannot stand it and they do not have a way out except for running away. The device has a backing from the police so its already being used ...so all I can say is all the best teenagers!!
Price: $1100
Via: Telegraph