Deluxe Bark Control Collarinhibits nuisance barking with adjustable levels. When your dog barks, a harmless static correction is emitted. There are 18 levels of correction. The collar automatically adjusts the level of static correction to your dog's temperament. Deluxe Bark Control Collar is safe and effective training method.3 correction modes, each with 6 levels of StaticCorrection that automatically adjust to your dog's temperamentThe most reliable bark detection technology availableLow battery indicator One of the smallest and lightest units available at on 1.5 ozAdjustable collar for neck sizes 6"-28"FOR DOGS OVER 8 lbs.Click here to download operating and training guide in pdf format.