The PetSafe® Rechargeable Bark Control Collar helps stop excessive barking, whining and whimpering. The bark collar has 15 levels of static correction. When your dog barks the collar begins with low-level corrections. If excessive barking continues, the correction intensity will automatically increase with each successive bark until the barking stops. The unique bark sensor helps ensure no false corrections. If your dog barks 15+ times within an 80 second period, the bark collar will automatically shut off for 3 minutes. The collar is powered by a built-in, rechargeable battery – simply plug it into an outlet to charge. The PetSafe® Rechargeable Bark Control Collar allows you to enjoy more peaceful moments with your pup.