Lutron Electronics RA-AD-LA RadioRA Accessory Dimmer LUTRON RADIORA RA-AD Accessory Dimmer Multi Location LIGHT ALMOND LUTRON RADIORA RA-AD Accessory Dimmer Multi Location 120 Volts Use with RA-6D, RA-10D, RA-6ND or RA-5NE for up to Nine additional control locations in 3-way and 4-way applications