Sennheiser XSW IEM SR (B) Stereo TransmitterThe XS Wireless IEM transmitter features metal housing designed for durability and can be rack mounted system or used stand alone. The clear, backlit menu allows for easy setups even on dark stages. The XLR combo inputs provide flexible cabling options you can connect anything with a XLR or 6. 3 mm (1 4 inch) plug. You can preview your in ear mix locally with the headphone output on the front. Setting up gain, mono or stereo options, input