I've been using this for about six months, but I'm selling it because I no longer have a need for it. I've confirmed that it works, and there are no problems with voice input or volume adjustment. ■ Product Name FIFINE USB Condenser Microphone K669B (Black) ■ Compatible Models Windows / Mac (USB connection) ■ Features ・Unidirectional for clear sound pickup ・With volume adjustment knob ・Ideal for game streaming, voice chat, and telework ・Includes tripod stand and USB cable ■ Condition ・Operation: Normal ・Usage period: Approximately six months I will ship it in its original box. Please understand that this is a used item.