Single system headset wireless microphone set, KWS-899. Although unused, the box has some scratches. Everything in the photos is included. This is a set of one wireless microphone and a receiver. It's a one-to-one configuration with one receiver for one wireless microphone, making it ideal for simple situations where you use 1-3 wireless microphones. It's designed to stay in place even with vigorous movement, without obstructing your hands, making it convenient for drum vocals, presentations, fitness, and emcee microphones. It has a maximum usable distance of 90m (depending on the usage environment), a function to improve radio wave reception with two antennas and reduce errors (true diversity), and an auto-mute function in case the signal is interrupted. You can select your preferred channel from a total of 30 channels, and it's easy to set up via infrared (IR) communication. The receiver has an infrared (IR) port for settings, various buttons, a display, and a knob on the front, allowing you to make almost all settings on the front of the receiver. Thank you for viewing.