1. Excellent noise canceling microphone
2. Free stretching headband and 300degrees rotating microphone for all day comfort and either ear wearing.
3. USB connector, plug-and-play, no driver required
4. In-line speaker volume control of 25 degrees, microphone mute function
5. Intelligent mute with lamp indication
6. Spare parts: Leather ear pad x2, Microphone cushion x2