Simply Automated ZPCI-P30A Universal Plug In Phase Coupler Plug-In Phase Coupler for clothes dryer (PN: ZPCI-P30A) boosts signals between phases in a home and plugs into standard 30Amp (NEMA 10-30) clothes dryer outlets. Universal design passes UPB, X10 and other higher frequency powerline signals Makes ultra-reliable Universal Powerline Bus (UPB) technology even more robust. No new wiring needed! Simply Automated devices transmit and receive lighting scene commands with other UPB dimmers, UPB plug-in modules, UPB fixture modules and other devices  can control virtually any device that connects to AC power wiring anywhere in the home. To ensure a proper installation your home should be no more than 2500 square feet and have only one breaker panel. A phase coupler is required in some home installations. Not intended for use in multi-dwelling (condo, apartment, duplex) units.