This is a remote control that allows you to mute/unmute during Teams meetings. It's very convenient because you can operate it even when the Teams meeting is not the active window. Such devices are rare. I used it on Windows 10. Operation has been confirmed. Please refer to the following Microsoft page for instructions: https://support.microsoft.com/ja-jp/topic/microsoft-teams-%E3%81%A7microsoft-presenter-%E3%82%92%E4%BD%BF%E7%94%A8%E3%81%99%E3%82%8B-c28a2349-13e2-45f7-a367-19d928a72532 Only the items shown in the picture will be sent. There is no box. - Connection method: Bluetooth - Included items: USB cable - Instruction manual: Yes - Buttons: Power, Bluetooth connection button - Color: Black Thank you for viewing.