A couple who got fed up with hearing children screaming in their garden in Ipswich, Suffolk, invested in a child repellant.
The device emits a sound that most adults can't hear, but that causes severe discomfort in children.
Michael Mitchell, 66, and his wife Kathryn, 52, have been threatened with legal action by the local council after their neighbours complained.
They bought the Ultrasonic Teen Deterrent device online for 130 ($300) after becoming fed up with noise from the four children.
The Mitchells switch it on whenever, they claim, the youngsters - who are all aged under 10 - start screaming, forcing them indoors.