PetSafe Vibration Bark Control Collar 10 levels of vibration stimulation to eliminate or reduce excessive barking Patented Perfect Bark detection ensures another dog barking or other noises will not cause a false correction Waterproof collar submersible up to 5 feet for all of your dog's outdoor activities Collar begins with the lowest level of vibration and increases in correction level if the barking continues; Automatic safety shut off after 80 seconds Designed for dogs over 8 pounds; Fits neck sizes up to 28" Call, chat or email the PetSafe US-based customer care specialists six days a week