Sony Premium Lightweight Extra Bass Stereo Headphones With Universal In-line Microphone and Remote for Apple Iphone/Android Smartphone (Black) 30mm Dome-Type Drivers - The 30mm driver units coupled with ferrite magnets are designed to accurately reproduce a broad, dynamic frequency range, resulting in smooth transitions in treble and mid-range frequencies with ample bass response In-Line Remote with Microphone - The in-line remote with microphone allows for simple control: call answer/end, and audio track play/pause functionality Pressure-Relieving Earpads - The adjustable headband with swivel ear pads is designed for comfort so you can enjoy extended listening sessions without fatigue Y-Type Cable - The Y-type cord design helps reduce the chance of tangles while the 4-conductor gold-plated, L-shaped plug ensures connectivity Swivel Earcups - The swivel and folding-style earcups stow away for compact portability