This is a complete Bluetooth wireless microphone set. It's a set of wireless microphones and an audio-technica mixer that can be used for lectures, lessons, events, etc. It includes the NANZU NZ-210D/NZ-210C module, which allows you to make wired microphones wireless via Bluetooth, and allows you to use two headset microphones simultaneously. 【Set Contents】 ・audio-technica AT-PMX5P Mixer Body ・NANZU Bluetooth Microphone Module x 4 (Receiver and Transmitter Set) ・Headset Microphone x 2 ・Pin Microphone x 1 ・Various cables and conversion plugs ・AC adapter ・Storage case ・Various instruction manuals ※Can be used simply by connecting to a speaker. ※The set of wireless module + 2 headset microphones alone is a product with a list price of approximately 50,000 yen. Operation has been confirmed. There are no problems with audio output or mixer functions. There are minor scratches due to normal use, but it is generally in good condition. We ask for your understanding if you are purchasing a used item.