Sony Ex Series in-ear Headphones | MDR-EX155AP | PLUGnPOINT. 9 mm driver units deliver clear highs and powerful lows from a compact design. Tangle-free cable has a serrated design to resist snags and tangles, keeping your headphones knot-free. With 4 earbud sizes, (SS, S, M, and L), you’ll be able to customize your fit for comfortable on-the-go listening. Inline remote and mic for hands-free calls and switch tracks without ever having to touch your smartphone.