PetSafe Basic Bark Control Collar for Dogs 8 lb. and Up, Anti-Bark Training Device,  Waterproof, Static Correction, Canine 6 LEVELS OF PROGRESSIVE STATIC CORRECTION -customize to your pet to eliminate or reduce excessive barking NO FALSE CORRECTIONS - vibration detection of your dog's bark ensures another dog barking or other noises will not cause a false correction PROGRESSIVE CORRECTION - finds the right level for your dog by beginning with the lowest level of static and increases in correction level if the barking continues; Automatic safety shut off after 50 seconds WATERPROOF COLLAR - for all of your dog's outdoor activities AUTOMATIC SAFETY SHUT-OFF - will stop correction after 50 seconds FITS DOGS OVER 8 lb. - good for dogs of all sizes; Fits neck sizes up to 28" Call, chat or email with our expert PetSafe US-based customer care specialists six days a week; They are waiting to assist you and your pet with your product needs at 1-800-732-2677 or by email at ccc3@petsafe.net Manufacturers warranty is only valid when purchased from an authorized retailer