Rentokil PestFree Cat and Fox Deterrent Keep your garden free from cats, foxes and dogs and avoided unwanted fouling or damage of your lawn with this clever deterrent. It uses ultrasonic technology which can't be heard by humans to repel the animals without the need for poison and without harming other animals. Best of all it's compact, battery operated and easy to install - simply insert it into your grass using the ground spike, switch it on and it's ready to go. Dimensions: H12.7 x W9.7 x D5.2cm