Sennheiser XSW-D Mini Jack Transmitter, Plug-and-play Digital Wireless Transmitter with 1/8" (3.5mm) Mini Jack Connector, 75m Operating Range, and 5-hour Battery Life - 2.4GHz
Sennheiser XSW-D Mini Jack RX Wireless Receiver, Plug-and-play Digital Wireless Receiver with 1/8" (3.5mm) Mini Jack Connector, 75m Operating Range, and 5-hour Battery Life - 2.4GHz