This is a set of wireless microphones and a receiver. I purchased it on Amazon two years ago for 8,599 yen. I've only used it once, indoors for about 2 hours, so it's almost new. Please refer to the specifications in photos 6 and later. Both the microphone and receiver can be charged via USB-C, which is convenient. The original box, 2 microphones, 1 receiver, and other accessories such as USB-C cables are all included.