Motorola Bark 200U Ultrasonic and Vibrating Dog Anti-Bark Control Collar, Black Product Description The Motorola BARK 200U is an anti-bark dog collar that uses Ultrasonic and Vibration technology to help control the bark of your dog. Directions Turn product on and strap around the neck of your dog. Dog will be allowed 5 seconds of free barking time until the vibration and Ultrasonic is released as a bark deterrent. See all Product Description