PetSafe Gentle Spray Bark Collar for Dogs, Citronella, Anti-Bark Device, Water Resistant ELIMINATE OR REDUCE EXCESSIVE BARKING - uses a burst of citronella spray to discourage barking; unscented spray refills also available WATER RESISTANT - suitable for light rain or wet grass exposure. As this product uses only a microphone to detect barking sounds, other loud noises near the dog may cause the collar to activate unintentionally. Appropriate fit of the collar is essential to its function; the collar must be tight around the neck to prevent normal daily movement from triggering the microphone LIGHTWEIGHT - designed for dogs over 6 lb. with neck sizes up to 24" 300-400 SPRAYS PER CAN - each refill for collar holds 25-30 sprays 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