The DOGTEK BC-60 Bark Control Collar combines sound beeps with optional strong and weak static impulses for a proven and safe formula. The DOGTEK BC-60 bark control device provides a humane but effective solution to help train your dog to not to excessively bark. This bark collar has the ability to sense when your dog barks based on the vibrations caused by the barking, not the actual sound or noise of the barking dog. This is a great and unique feature since the collar can only be triggered by the dog wearing the collar, and never triggered by noises or barks from another dog barking around them. The static corrections of the BC-60 are simple and not harmful; very similar to what a human would experience after rubbing their feet on a carpet and touching a metal doorknob. This collar is recommended for all breeds 15 lbs and greater. Requires one CR123 battery (included).