High-Quality Audio Experience - Made for calls and music, UH34 Wired Headset is kitted out with a high signal-to-noise ratio speaker and independent cavity design. The passive noise cancellation creates a richer and clearer conversation with reduced background noise. | Wide Compatibility- Authorized by Microsoft Teams and Zoom, so you can choose UC or Teams Version. Also certified for Skype, Whatsapp, and the other popular online voice call services. Compatible with Win8/Win10/XP, or MacOS operating system. | Comfortable Wearing - Designed with replaceable soft leather (UH34) ear cushions, the headset can softly cover the ear and support long conference calls, which keeps you enjoying supreme comfort all the time. | Intuitive Control Unit - In-line call controller with LED indicators, making managing of calls easy. You can answer and end calls quickly and easily, control volume and mute the line directly from the control unit. | Contact Us With Any Question-YEALINK Warranty: 30 days money back, 60 days free return, life time warranty. This Package including 1pcs headset , 1pcs cable, 1 pcs collecting bag, 1 pcs user manual, More than 2,000,000 users have a good conference experience with YEALINK, Redefine Your Workspace.