Audio-Technica ATH-ANC33IS In-Ear Headphones with active noise cancelling, up to 20dB noise reduction, closed, frequency response 20Hz-20kHz, 32 Ohms impedance, 105dB SPL, 1,3 m cable lenght, 3.5mm stereo mini-jack, takes AAA battery, ideal for mp3, CD, DVD and in-flight entertainment. Weight: 26 g,color black, includes airline adapter,protective poch,ear tips (3 sizes),battery,