Aetertek AT-919C Dog Training Collar With Remote 10 Levels Of Shock Vibration and Beep for Small, Medium and Large Dogs Pet Safe Waterproof Rechargeable 1000 Yards Range With Auto No Bark Feature Stops dog's unwanted bad behavior. Collar features vibrate, beeps and 10 levels of progressive electric static shock. Safe and effective. Very humane dog training collar, strong vibration stops dog's bad behavior 99% of the time. Waterproof collar receiver. 100% waterproof and rechargeable collar and goes up to 1000 yards in range. Fits all small, medium and large dogs from 15 to 100 pounds with a collar size from 8 to 26 inches long. Automatic no bark feature. Comes with an automatic bark function feature.