RDL DS-TPS3A XLR Microphone and Stereo Wall PlateThe D SERIES TPS3A modules are three pair audio sending modules compatible with RDL Format A twisted pair products. These modules are designed to be mounted in wall boxes, cabinets or other enclosures that allow users to connect audio sources. The TPS3A models mount in RDL WB 1U and WB 2U wall boxes, or in standard U. S. electrical boxes. The D TPS3A features a white front panel laminate with gray lettering that matches RDL Decora style remote