Stops Cats From Fouling Lawns & Gardens, With 50% Bigger Coverage Area Than Other Models & Pir Sensor To Maximise Efficency & Increase Battery Life. this Motion Activated Device Gives Out An Ultrasonic Sound Thats Uncomfortable For The Catstops Cats From Fouling Lawns & Gardens 50% Bigger Coverage Area Than Other Models With Pir Sensoroptional Mains Power With Test Button & Led As Standard For Outputs Checks in Built Mounting Stake For Secure Placement comes With A 2 Year Manufacturers Warrantywelfare Friendly Deterrent That Does Not Harm, Cats, Dogs Or Wildlife.also Available Optional 9v Mains Adapter With 5 Metre Extension Cable