1,hotselling model 2,good quality 3,Noise cancelling 4.factory price 5.one-stop service,drop shipping, ... dBFrequency Response20 Hz - 20 kHzImpedance40 ohmsColorBlackFeaturesClosed Back, Noise Cancellation, Noise IsolationConnectivity TypeWiredNoise CancelingWith Noise CancellationNoise IsolatingWith Noise IsolatingCable Length4.27 ftPlug Type3.5 mm ...