Communication headset suitable for calls such as video conferencing in the office and telework, and online language learning The "KOSS CS200i" is a communication headset suitable for not only video conferencing in the office and telework, but also for calls such as online language learning, online games, and live streaming. KOSS's uniquely developed D-shaped housing, which conforms to the shape of the ear, provides a moderate sense of adhesion, realizing a listening environment that balances the output sound and the surrounding sounds. The boom microphone can be moved flexibly and fixed in a position that is easy to speak into. In addition, it employs a noise-canceling microphone that cuts out surrounding noise and enables clear calls, delivering easy-to-hear audio to the other party. I purchased this for personal use because it was convenient to use at work, but I ordered too many and am selling the extras.