This is the ideal system to ward off teenagers around your building. This device produces high frequency sound waves, which only 12-18 year olds can hear. Most adults, toddlers and even domestic animals can’t hear this sound.

Click on the link below for a live test:

Ultrasounds which teenagers can hear (device)
Ultrasounds which adults can hear (simulation)


RBQ: # 8328-7896-10
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