ATH-CK350iS I'm selling these because I don't have a chance to use them. From the official website: The built-in microphone makes it easy to hear the other person's voice and doesn't pick up unnecessary noise. It works smoothly not only with smartphones but also with video and audio calls on computers. ● φ10mm driver for high-quality sound reproduction. ● Dedicated duct for reproducing sharp bass. ● Grooved wave cord that is tangle-resistant. ● Sealed type that prevents sound leakage. ● Cord winding holder to freely adjust the length of the cord. ● Remote controller with microphone for music/video and call operation at your fingertips. Although they are new and unused, they have been stored at home for about 5 years. Thank you for your understanding. #Earphones