Lightweight 30mm neodymium dynamic driver units enable the headphones to deliver a punchy, rhythmic response to even the most demanding track. This combined with a highly sensitive diaphragm, you'll be able to turn the headphones up louder enjoy clear, precise audio. Take these headphones anywhere you go. The headphones' swivelling earcup design enables easy storage when you're not using them, and enhances portability when you're travelling. With an in-line remote and built-in microphone on the headphone cord, you can take hands-free calls from selected smartphones while listening to music. Switch easily between songs and calls with no need to remove your headphones.* *Only featured with the MDR-ZX110AP model. Listen in total comfort. These headphones have a self-adjusting headband and soft cushioned earcups that cover the whole ear. Enjoy the long-lasting comfort you need for listening to your favourite albums back-to-back. The closed-back, enfolding design wraps around the ear, helping to seal in music and keep distractions out. Acoustics are reflected back towards your ears, so you hear even the subtlest of sounds. You'll also feel every beat, as the closed-back design helps to maximise the bass signatures in your music. The wideband frequency range - spanning 12Hz to 22kHz - delivers deep bass, rich mid-levels, and soaring highs. Hear the detail in every track and stay in tune with all your music.