The Defenders Mega-Sonic cat and dog repeller is motion-activated. When its sensor detects animal movements in its assigned area, a blast of sound is emitted through its speaker unit. The sound frequency is too high for humans to register, but deters cats, dogs and foxes effectively.
It’s easy to set up with its ground anchor and adjustable stand height, and there's a push button testing feature with LED activation.
The Mega-Sonic cat and dog repeller is powered using 6x Alkaline LR6 (AA) 1.5V batteries (not included) or optional mains adaptor with an extension cable.