• Smartphone playback control - The integrated microphone and multi-function control button make the the MDR-ZX310AP the perfect companion for your smartphone. Android™ users can also enjoy the convenient Smart Key app for added control functionality directly from your smartphone. • Quality Sound - The large 30mm driver units coupled with ferrite magnets will accurately reproduce a broad, dynamic frequency range. You'll enjoy smooth transitions in treble and mid-range frequencies with powerful bass response. • Pressure Relieving Earpads - The lightweight, adjustable headband with swivel ear pads is designed for comfort so you can enjoy extended listening sessions without fatigue. • Swivel Earcups - The slim, swivel and folding style earcups stow away for compact portability. • Y-Type cord