Sony Premium Lightweight Extra Bass Stereo Headphones (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 Pressure-Relieving Earpads - The adjustable headband with swivel ear pads is designed for comfort so you can enjoy extended listening sessions without fatigue Swivel Earcups - The swivel and folding-style earcups stow away for compact portability 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 Folding design for easy portability - The collapsible construction and swivel earcups make it easy to stow the headphones in a backpack or bag for travel