Dog Bark Collar - Vibration and Sound Automatic Training DeviceThis automated dog training collar is a humane, safe and highly efficient for pet education. It is composed of a collar with Vibrating and Sound only unit in which the unit is put on the dog's neck and will automatically sound and then vibrates when your dog barks. How this automatic dog collar works? An internal microphone picks up the bark sound and the dog collar is automatically activated The dog collar starts with emitting a beeping sound of 1