Indoor Bark Control, Ultrasonic This tastefully designed tabletop device can help safely control your dog’s barking from up to 25 feet away. Whenever your pet barks, a 2-second ultrasonic tone correction can be delivered either automatically or manually – your choice. Your dog will learn to associate his barking with the unpleasant sound (inaudible to most humans). Now there's the answer to the problem barker! No receiver collar needed Table-top or hand-held use Activated automatically by bark or manually by owner 25-foot range Uses a 9-volt alkaline battery Type: Bark Control