These are ELECOM wired earphones with a microphone for web calls. They are ideal for telework and online learning, featuring a mute function. [Brand] ELECOM [Model Number] HS-EP17TBK [Connection Type] Wired (4-pole mini-plug) [Functions] Mute function, with microphone [Type] Earplug type [Other] Includes a 3-pole x 2 conversion adapter Although unused, please consider this item with the understanding that it has been stored at home. Thank you. Headset Wired 4-pole φ3.5mm with microphone and mute switch HS-EP17TBK (Black) Brand: ELECOM Wearing style: Both ears, integrated left and right Plug shape: Mini-plug Weight (g): 12.0 g Color: Black Earphone/Headphone Features: Microphone, Remote control