Other features: The Lenovo 100 In-Ear Headphone is a half-in-ear headphone with an in-line mic that lets you switch seamlessly between music and calls. It provides premium design features such as mic and headphone noise isolation. It's 9mm drivers deliver excellent sound quality every time. With 3 sizes of ear cups, users can enjoy long-lasting, all-day comfort. When they're done listening, the headphone can be stored in the provided pouch.