Compact, high-quality sound. The highly sensitive 9mm driver delivers clear highs and powerful bass in a compact design. Integrated remote control and microphone for hands-free calls. Make hands-free calls with the built-in remote and microphone, and select music tracks without touching your smartphone. No cable clutter. The cable is ribbed to prevent tangles and messy headphone wires. Earbuds in four sizes. Four earbud sizes (XS, S, M, and L) allow for a customized fit for a comfortable listening experience on the go.