The Robert Dyas STV Big Cheese advanced pest repeller combines ultrasound and electromagnetic action to deter, but not harm, pests residing in or near your home.
Seeking-out rats and mice, the EMC pulses through wiring to reach nest sites within walls, ceilings, wall cavities, or anywhere rodents might be hiding. Ultrasonic sounds are emmitted from the device, which are inaudible to cats, dogs and people, but effectively drive pests from the home.
The Big Cheese repeller comes with a test button and halo-red LED indicator. Mains powered only.