With the Waterproof Collar Receiver and the Water Resistant Transmitter, there is no need to worry about using this collar on rainy days. The system features a tone only button on the side, a continuous stimulation button (top button on the front) and a button (bottom button on the front) that delivers continuous stimulation two levels above the current setting for when your dog needs a stronger correction immediately. This easy to use, lightweight collar operates on a 3 volt lithium battery and has 8 levels of correction.