Purchased at Kojima about two years ago and used only once. After use, it was stored in its box and kept at home. This is a single-ear type, ideal for long hours of use via USB connection. My impression of using it was that it was light and comfortable, without causing any ear pain. Volume adjustment and mute can also be operated with the controller at hand. - Brand: ELECOM - Connection method: USB - Driver unit: 30mm - Microphone type: Single-ear type - Cable length: 1.8m ◉ Although used once, it is almost new. ◉ The warranty period has expired, and there is no receipt from the purchase. ◉ There may be stains, scratches, or oversights that cannot be confirmed in the images. Please refrain from purchasing if you are sensitive or seeking perfection. ◉ I will handle business during work breaks, so it may take some time for communication and shipping.