Lightweight and closed back design Tightly-stitched?? padded headband and ear bands for stylish comfort Stainless steel framework and adjustable arms Brand new 40mm neodymium magnet driver Dynamic transducer Honest-and-true audio reproduction Screw-on 1/8 (3.5mm) to 1/4 (6.3mm) adapter Driver diameter: < 40mm Impedance: 32W Sensitivity: 95dB +/- 3dB Frequency response: 15Hz "22kHz Max power: 400mW Cable length: About 9.8' (3m) when fully extended<B</br></br>Product Description</br></br>TH-200X Studio Headphones</br><br/>http://www.amazon.com/gp/product/B00IIAL666n