Retractable Single-Ear Earphone with Controller, 4-pole type [PHP-K01] As shown in the photo, I purchased this yesterday (12/21) at Yamada Denki. I used it for about 10 minutes. The person I was talking to online said they could hear me perfectly fine, so I think the microphone performance is not a problem, and I had no issues hearing them either. However, I still feel uncomfortable without a microphone near my mouth, so I am putting it up for sale. Features/Design Compact and convenient for storage and carrying Operable with an in-line controller Can be used simply by connecting to a 4-pole terminal on a computer These are retractable microphone earphones that can be used immediately by connecting to a 4-pole terminal and are convenient for carrying. Equipped with volume adjustment and mute function, making them ideal for use in voice chats. Single-ear type allows you to hear ambient sounds The single-ear type allows you to hear the surrounding environment. You can respond even if someone speaks to you while using them, so you can use them while working or doing tasks. Operable with an in-line controller Equipped with an in-line controller that allows you to control the microphone ON/OFF and volume adjustment. You don't need to use the volume adjustment function on the computer every time. Microphone mute button Equipped with a microphone mute function, making it ideal for use in web conferences and online classes. Volume adjustment button You can intuitively adjust the volume with the volume adjustment slide button. Music play/pause button You can easily operate music playback/pause, etc., with the button. 〈Supported operations〉 ・Music playback/pause ・Skip to the next or previous song Highly sealed canal type Canal-type earphones with high sealing properties that reduce stress during long-term use. You can choose from three sizes of ear tips: S/M/L. *M size already attached Retractable for convenient carrying Adopts a retractable cable that can be adjusted to your desired length. It can be stored compactly. Also, the connector is fixed, so it's safe to carry. Elecom Buffalo Logicool BOSE Sony Audio-Technica JVC JVL