The Sennheiser XSW-D Instrument Base Set makes utilizing a wireless accordion/instrument system easier than ever. Enjoy 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. Ideal for accordion, the transmitter can swivel to a 90 degree angle from the plug allowing the system to uniquely tuck up tight to the accordion body. You also get a convenient mute function on both the transmitter and receiver. The XSW-D Instrument Base Set is absolutely elegant — it makes wireless performances effortless while providing the level of fidelity, quality and reliability that Sennheiser is known for.