Lightweight, comfortable yet sturdy describes the HiFiMan HE-400i Headband Headphones. Its over-the-ear design, along with a suspended headband offers a snug fit. Designed to provide a detailed sound, it works at a frequency range of 20 Hz - 35 KHz with 35-ohms impedance level and 93-dB sensitivity. This pair of black headphones assures an authentic performance. In addition, this plug-in model comes with a cord, which is 4.92 ft long for added convenience.