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