Beyerdynamic DT 131 TV Trendline TV-Stereo Headphones Lightweight, comfortable, open-back headphone for TV or stereo listening Integrated volume control is adjustable for left (L) and right (R) separately 20 Hz to 18 kHz frequency response Single-sided 18-foot cable with 1/8-inch stereo mini jack and 1/4-inch adapter 40-ohm impedance Connectivity technology : Wired