The HD 400S features a one-button smart remote, which allows you to control music and take calls with ease, and the sturdy folding design makes these headphones durable and compact enough to be taken anywhere. FEATURES - Well-extended sound response with dynamic bass for a unique listening experience - Closed-back around-ear headphones reduce unwanted background noise for your comfort SPECIFICATIONS - [Transducer principle] dynamic, closed-back - [Wearing style] Over-Ear - [Acoustic principle] closed - [Adapter] 3.5mm, angled - [Cable length] 1.4m - [Weight] 217g - [Frequency response (speaker)] 18 Hz to 20,000 Hz - [Impedance] 18 Ω - [Transducer size] 9.7 mm - [Total harmonic distortion (THD)] < 0.5% (1 kHz, 100dB) - [Frequency response (microphone)] 100 to 10,000 Hz - [Microphone pick-up pattern] Omni-directional - [Wearing style] Over-Ear INCLUSIONS - HD 400S around-ear headphones - RCS 400 detachable single-sided cable with 1-button remote and 3.5 mm angled plug