Enhance your audio experience with the Plantronics (Poly) Blackwire C520-M USB Binaural Microsoft-Certified Headset. This headset is perfect for those who are looking for a comfortable and efficient audio device. It has an adjustable headband, volume control, and noise cancellation features that provide an excellent audio experience.The headset has a boom microphone type and comes with double earpieces. It is certified by Microsoft and is compatible with various devices via USB connectivity. The Plantronics (Poly) Blackwire C520-M headset is an excellent choice for those who want to enhance their audio experience while working or enjoying music.