AUDIO TECHNICA ATH-ANC27 Noise-Canceling Headphones (Discontinued by Manufacturer) QuietPoint active noise reduction up to 18 dB. Connectivity Technology: Wired 40mm driver diameter 20-20,000 Hz frequency response 106 dB sensitivity; Max. input power 500 mW 33 ohms impedance 3.9-ft cable 3.5mm stereo jack Color: Black