The system is designed to be used for up to 20 minutes at a time. A timer is included with the unit. There is also a manual over-ride button that will switch the system on between programmed times if required, for a period of 20 minutes.
I am not a teenager, will the Mosquito affect me?
This is very unlikely and research has shown that the majority of people over the age of 25, have lost the ability to hear at this frequency range. It should be borne in mind, however, that the unit usually has the desired effect – moving the crowds away – within just a few minutes, at which time the unit can be turned off. So even if you are able to hear the noise to some degree, you would not have to put up with it for long.