Features: [10mm Dynamic Driver] 10mm dynamic driver provides crystal-clear sound and enhance bass with excellent depth and detailed resolution. [Hands-free Calls] Built-in high-grade Microphone sets your hands free from answering and ending calls during exercise and travel. [In-line Control] In-line control function, easy to control volume and music playback, next / previous track and answering / ending calls. [Strong Compatibility] 3.5mm wired headphones is compatible with most 3.5mm audio devices. No need to worry about running out of power. [Comfortable to wear] In-ear headphone with three sizes of eartips ensures long time wearing comfort. Earhook hanging design, not easy to fall out.