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 lowlevel 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 and more times within an 80 sec period, the bark collar will automatically shut off for 3 min The collar is powered by a builtin, 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