Some dogs just have a whole lot to say. The Basic Bark Control Collar is an effective solution for training your dog to curb his excessive barking. This bark collar includes 6 levels of static correction so you can find what works best for your dog. A built-in safety feature automatically shuts the collar off for 3 min. if your dog barks more than 15 times within an 80 sec. period. Because the correction is immediate and consistent, your dog will learn to associate his barking with a correction and change his behavior within as little as 2 weeks. That's a win for you, your dog and your neighbors! Your pet deserves the best. Trust PetSafe to help keep your pet healthy, safe and happy. Includes 15 levels of static correction so you can find what works best for your dog Uses PetSafe RFA-67 battery (included) Waterproof up to 3 ft. so you dont have to worry about walking in the rain or splashing in puddles Fits dogs 8 lb. and up and adjusts to fit neck sizes up to 27 in. Works for dogs of all sizes, but best for medium to large size dogs