AKG K-391 NC In-Ear Hi-Fi Headphones - closed-back, dynamic, active noise cancelling ( up to 40 h), 12 - 24.000 Hz, 16 ohms impedance, 10 mW max input, 96 dB sensitivity, ca. 1,5 m cable with 3.5mm stereo mini-jack, weight excluding cable: 8g, incl. case and flight adapter, Colour: black/silver