http://software.x10.com/pub/.../rr501-is.pdf
Installation and operating instructions for ... Wireless remote controls such as the KR19A and HR12A send ... 1. Plug the RR501 Transceiver into any 120V AC outlet. ... THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. ... X10 Wireless Technology, Inc. Limited One Year ...