Compact, high-quality sound; High-sensitivity 12 mm driver units deliver clear highs and powerful lows from a compact design. Tangle-free cable; The cable has a serrated design to resist snags and tangles, keeping your headphones knot-free. 4 sizes of earbud; With a range of 4 earbud sizes, (SS, S, M and L), you'll be able to customise your fit for comfortable on-the-go listening. Inline remote and mic for hands-free calls; Take hands-free calls and switch tracks without ever having to touch your smartphone, thanks to the inline remote and mic.