Plug-and-play Digital Wireless from Sennheiser The Sennheiser XSW-D 1/8-inch transmitter makes building a wireless lavalier mic system child's play. Benefit from one-touch ease of use and 2.4GHz digital transmission for worldwide, license-free compatibility. This transmitter is robust enough for everyday use, delivering a 250-foot operating range and up to five hours of battery life on a single charge. You also get a convenient mute function. The XSW-D 1/8-inch transmitter is supremely elegant — it makes wireless presentations effortless while providing the level of quality and reliability that Sennheiser is known for.XS Wireless Digital — wireless made easy Want to go wireless? Well, it doesn't get any simpler than Sennheiser's XS Wireless Digital, thanks to its intuitive plug-and-play operation. The series includes a flexible array of compact plug-on transmitters and receivers, enabling compatibility with lavalier mics, handheld mics, and instruments. At GearNuts, we appreciate the XS Wireless Digital's 2.4GHz operating frequency,