This is a wired headset from Sony, approximately 20 years old. It has been used sparingly. I have briefly tested the microphone and sound output. When adjusting the volume on the remote control, there is some crackling. The crackling may disappear with use. The original ear pads are missing, so they have been replaced with slightly larger ones. Another set is included as a bonus. A USB adapter is also included as a bonus. *Shipping from a remote island, so it will take about a week for delivery.*