Sony MDR-G74SL Street Style Headphones Large Turbo Duct For Extra Bass Foldable For Easy Transport Gold-Plated Stereo Mini Plug High-Power, 30Mm Neodymium Driver For High-Quality Sound Lightweight &amp; Portable Open-air headphones are worn behind-the-neck for comfort, fashion, and stability; uses folding, non-slip headband 30 mm diameter drivers and Turbo Duct for deep bass reproduction; 12 to 24,000 Hz frequency response Neodymium magnets provide maximum energy with minimal size Durable, L-shaped, gold-plated minijack .125-inch input jack Oxygen-free copper cord for maximum conductivity and minimal noise; includes 3-foot extension cord