Wireless Clip-on Microphone This product converts a wired microphone into a wireless one. It has been stored indoors for a long period of time and has not been used. It is battery-powered. There is no battery leakage. Since the operation has not been confirmed, it is considered as a junk item. Thank you for your understanding. - Type: Wireless Microphone - Included items: Transmitter, Receiver Thank you for viewing.