This is a Buffalo single-ear headband-style monaural headset. I've only used it a couple of times. There are no noticeable scratches or stains, but please understand that this is a used item. Model number: BSHSHCM105BK Cable length: Approximately 1.8m External dimensions (width x height x depth): 130 x 155 x 45mm (excluding microphone arm and cable) This model connects via a 4-pole mini-plug, compatible with tablets, smartphones, and the latest PCs. It offers a stable fit and is a standard headband-style headset that is comfortable to wear for long periods. By adopting a larger 27mm driver than previous products, it achieves high-quality sound. You can enjoy immersive sound quality not only for chats but also for games. It's a single-ear type that allows you to hear the surrounding sounds while talking, so you can enjoy calls while watching TV or listening to music, or enjoy chats with peace of mind while hearing your surroundings. It's also ideal for those living alone, as you can hear the sounds of intercoms and phone calls. It reduces breath noise and wind noise that occur during conversations with a screen. It comes with a controller that allows you to adjust the volume and mute the microphone at your fingertips. There's no need to operate the computer each time.