Features 6 levels of progressive static stimulation to eliminate or reduce excessive barking. Vibration detection of your dog's bark ensures another dog barking or other noises will not cause a false correction. Collar begins with the lowest level of vibration and increases in correction level if the barking continues; Automatic safety shut off after 80 seconds. Waterproof collar submersible up to 1.5 meters for all of your dog's outdoor activities. Designed for dogs over 3.6 kg, fits neck sizes up to 71 cm .