. Sound meets style with smartphone playback controls for life on the go. More than your basic pair of over-the-head headphones the Sony MDR-ZX310 headset delivers rock-solid audio performance integrated microphone for hands-free calling and media playback controls for convenient operation. Key Product Info . 30 mm dynamic driver unitOn-ear headbandFour-conductor gold-plated L-shaped stereo mini plug . Smartphone playback controlThe integrated microphone and multi-function control button make the the MDR-ZX310 the perfect companion for your smartphone. Quality soundThe large 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 earpadsThe lightweight adjustable headband with swivel ear pads is designed for comfort so you can enjoy extended listening sessions without fatigue. Swivel earcupsThe slim swivel and folding style earcups stow away for compact portability..