This is a receiver for the SENNHEISER XSW-D series. It is new and unused (only tested for functionality). *This listing is for the receiver only. A transmitter is required for use.* I purchased the XSW-D INSTRUMENT BASE SET, but I am only using the transmitter, so I am selling the receiver. Although it is a new and unused item, please understand that it has been in someone's possession, and please refrain from making claims or returns. *To avoid trouble, I do not offer exclusive listings or holds.*