Made for phones with RJ9 headset port, this wired headset plugs directly into your phone without the hassles of any QD adaptors or special cable accessories. It has universal compatibility with most of the new desktop and IP phones like Yealink, Polycom, Cisco, Avaya, Grandstream and many others. With a robust noise canceling microphone that filters 90% of the background noise, your voice will be all they'll hear. The broadband audio frequency will make your voice sound more natural too. The microphone boom rotates 300 so you can wear the headset on either ear. It also automatically mutes when the boom rotates 60 up or down. Leather and foam ear cushion provides durability and comfort. You're automatically protected from sudden volume surges as well.