Bark Collar - Electronic High Quality Bark Control Training Electronic Dog Collars - Adjustable Sensitivity Control - BONUS Extra Battery Included! Adjustable Nylon Collar Safe for Dogs 10-120 lbs Easy Adjustable Sensitivity Level - Just Spin the Dial! Humane, Cost-Effective, and Smart Solution to Training your Dog to be Quiet Lightweight Receiver is Perfect for Most Dogs, Including Some Toy and Smaller Breeds Includes Receiver, Operating Manual, and Additional 6-Volt Battery