Experience deep, satisfying bass tones thanks to a high density acoustic resistor, which is effective at all volume levels. This audio enhancing technology enriches your favourite songs and albums whilst supporting supremely clear high frequencies that bring every detail to your ears. Smart controls on your headphones you won't miss any more calls thanks to the inclusion of an in line button for taking and ending calls, which is compatible with most smartphones. Use the built in mic on the cable to enjoy clear, personal conversations. Sony mdrex110apw.ce7 headphones also include a handy in line remote control for easily changing, playing and pausing tracks while you're on the go. A selection of small, medium and large ear buds has been included to ensure that the headphones are comfortable for most ear sizes. They'll keep you comfortable for hours of listening on end, and provide a snug fit that locks in all that audio goodness.