The D SERIES-TPS2A modules are two-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 -TPS2A models mount in RDL WB-1U and WB-2U wall boxes, or in standard U.S. electrical boxes. The D-TPS2A features a white front-panel laminate with gray lettering that matches RDL Decora-style remote controls.The DB-TPS2A features a black front-panel laminate. The DS-TPS2A is constructed of stainless steel to coordinate with RDL Decora-style stainless steel remote controls in commercial/industrial installations.These modules drive only two cable pairs, therefore they accept a signal and power from one mic-level or line-level Format-A single-pair sender.