Z-Brands Anti Bark No Barking Tone Shock Training Collar for Dogs The Anit-Bark Collar applies a short tone when the dog barks and increases with intensity as needed to adjust. The collar comes with 7 correction levels sound, vibration, and shock. The sensitivity can be adjusted by + - buttons manually. 2 Sets of contacts points attached. Large contact points should be used for more bushy/thicker dogs Package includes Water-resistant receiver, adjustable nylon collar, users manual, 6 volt replaceable battery, 2 set of contact points and a light tester. Recommended for dogs between 18lbs to 120lbs