The VBC-10 Vibration Bark Control Collar has two main functions that shorten the training phase and promote good behavior. The bark control collar offers 10 combinations of vibration stimulations. When the dog barks, a vibration is emitted from one of the two vibration points. The duration of the vibration is random, which interrupts the dog's barking. When used according to the instructions, the vibration collar safely reduces disruptive barking, and in most cases, it is completely eliminated. The vibration collar is equipped with Perfect Bark technology. It uses both vibration and sound sensors (Dual-Detection) to distinguish your dog's barking from other external noises. This ensures that your dog's barking is the only sound that triggers the stimulation. If your dog barks 15 times or more within a period of 1 minute and 20 seconds, the Bark Control Collar automatically shuts off for one minute.