Compact, high-quality sound. 9mm high-sensitivity driver units deliver clear highs and powerful bass in a compact design. Integrated remote and microphone for hands-free calls. Make hands-free calls with the integrated remote and microphone, and select music tracks without touching your smartphone. No tangled cables. The cable is ribbed, which prevents tangled and knotted headphone cables. Four sizes of earbuds. Four earbud sizes (XS, S, M, and L) allow you to customize the fit for a comfortable listening experience on the go.