RDL DB-TPS1A Active Single Pair Sender with XLR Input (Black) - Custom Engraving OptionThe D SERIES TPS1A modules are single 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 TPS1A models mount in RDL WB 1U and WB 2U wall boxes, or in standard U. S. electrical boxes. The DB TPS1A features a black front panel laminate. Features: Balanced Microphone XLR Input with Phantom Switch