Intermatic RC613R Receiver, Intermatic RC613, 115v/230v, Single ChannelCalifornia Residents WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov Modular Radio Receiver Controls This modular unit operates on its own as an ordinary ON-OFF switch, but also responds to the signals of a hand held transmitter. The module is designed for indoor or outdoor use and can handle a variety of switching applications typical around the pool or spa. By the push of a button on the face of the transmitter, the user is able to turn ON-OFF a connected load that is within 100 feet, inside or outside of the house. In addition, a single transmitter can operate up to three receivers and is able to "teach" each module a different code. (Transmitters are sold separately) The receiver requires a neutral wire even if the switched load operates at 230v. This is the 115/230v model, also available as 115v