PetSafe Elite Little Dog Spray Bark Control ELIMINATE OR REDUCE EXCESSIVE BARKING - uses a burst of citronella spray to discourage barking; unscented spray refills also available PERFECT BARK DETECTION - patented system prevents false corrections from other noises including another dog barking WATERPROOF COLLAR - for all of your dog's outdoor activities 400-500 sprays per can - each refill for collar holds 30-40 sprays Fits neck sizes up to 20 inches 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