Used as a stand-alone training system or as a great accessory to any Humane Contain electronic fence system, the Radio Mat is an electronic scat pad that triggers stimulus at your dog's receiver collar whenever he touches the pad. Use it to keep your dog away from the trash, off of furniture, out of an entire room and away from any area you wish to make off limits. At the touch of a paw, the pad sends a radio signal to the RC-8 receiver collar (included) that emits a harmless, but unpleasant shock stimulus to make your dog scat. Only dogs wearing the collar are affected. No need to worry about small children or unsuspecting guests touching the pad and receiving the shock. You can add an unlimited number of extra transmitter pads and extra radio collars. Also includes Sound Blast feature, in which the pad itself emits a loud sonic blast at the touch of a paw. Use the sound to reinforce the shock stimulus or all by itself for painless area restriction training of cats and dogs. No collar is required to operate the sound blast feature so, you may use this feature to keep your kitties and other pets at bay without the need of a collar. Pad requires a standard 9 volt battery (not included). Pad dimensions: 12-inch wide by 60-inch long.