The PetSafe Lite Rechargeable Bark Control Collar decreases nuisance barking and whining. This waterproof collar was designed for dogs that might need a milder static stimulation than one of our standard bark collars. This collar utilizes unique bark-sensing technology to only activate when your dog barks. The collar automatically adjusts through 15 levels of safe, but annoying static correction levels to find the perfect setting for your dog. As your dog learns to bark less, correction levels are reduced.