HifiMan HE-400S are Ear-Cup (Over the Ear) Headband headphones that deliver great listening experience. The frequency range covered by the model is 25 Hz - 35 kHz. With 22 ohms impedance level and 98 dB sensitivity, this pair of black/silver headphones produces authentic sound. In addition, the plug-in model comes with a cord which is 4.92 ft long. The headphones weigh 12.34 oz.