The Sennheiser EM-XSW 1-E is a professional rack-mountable wireless receiver operating in UHF frequency bands. It supports frequency ranges of 821.000-832.000 MHz and 863.000-865.000 MHz for reliable wireless audio transmission. As part of the XSW series, it features a 1U rack design with standard audio outputs for integration into professional sound systems. The unit weighs 866 g and measures 275 mm in height, 255 mm in length, and 84 mm in width. Designed for live sound applications, it includes rubber feet for desktop use and comes with an NT 12-5CW power supply for stable operation. The system is compatible with dynamic microphone elements with cardioid pickup patterns, suitable for various performance environments.