Discharges a harmless low power charge similar to static electricity to say, “No!” when you can’t. Just place the ScatMat on your sofa, in a room entrance or at another problem spot. When touched, the pad will send small impulses for 3 seconds—just enough to say “Off!” As your dog learns that she should stay away, the ScatMat can be moved to another problem area in the home. A blinking light indicates how many times the mat has been stepped on, helping you decide when training period is complete. Powered by 9-volt battery (not included).