Sennheiser EM 203mf
Product Description From Sennheiser:
The EM 203 MF mainframe is used for smaller 5000 series receiver systems. At the front, up to three receiver modules can be housed. The back panel is equipped with an I/O module. The EM 203 MF features two integral passive 1-to-3 antenna splitters. The EM 20-NT plug-in mains unit is not included in the supply schedule, please order separately!