The Radio Design Labs RDL D-RCX2 Room Control is designed for the RCX-5C Room Combiner, providing precise audio control within individual rooms. It features long-life pushbuttons for easy Music or Local/Combined selection and an optical rotary encoder with LED readout for setting audio levels accurately. The device allows one or two RCX-2 units to be connected in the same room for expanded control options. Its Decora design includes an all-steel panel and rear enclosure, ensuring durability and a professional appearance suitable for various installations.