AKG K-495-NC - noise-cancelling, stereo headphones, active noise reduction, in-flight adapter with impedance changer, dynamic, closed, 121dB SPL, 20Hz-20.000Hz, 26 Ohms, 1.4m cable, stereo mini-jack connector, unique 3D axis folding mechanism, approx 40hr playing time with low battery warning. Suitable for mp3, MD, CD player and multimedia, Weight: approx 235g, charging with USB, incl. USB cable and adaptor, incl. Premium carrying case