The Sennheiser XSW-D Presentation Base Set makes building a wireless system child’s play. Benefit from one-touch ease-of-use and 2.4GHz digital operation for worldwide, license-free compatibility. This system 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 on both the transmitter and receiver. The XSW-D Presentation Base Set is supremely elegant — it makes wireless presentations effortless while providing the level of quality and reliability that Sennheiser is known for.