The Audyssey ACM1HB Sound Calibration Microphone is a portable unit designed to optimize the sound performance of audio systems from brands such as Denon, Onkyo, and Marantz. This black microphone features a connector for easy setup and calibration, making it a convenient accessory for enhancing your home audio experience. Ideal for achieving precise sound calibration, this microphone is a must-have for audio enthusiasts looking to elevate their TV, video, and audio setup.