Enjoy great audio from your playlists, podcasts, and entertainment with the Sennheiser HD 400S Headphones. With dynamic bass and balanced sound, they'll put you right in the middle of the action.The large ear cups with passive noise cancelling are ideal when you don't want to be disturbed. And the in-line microphone and remote mean you can answer calls without touching your phone.In a hurry? The headphones have a fold-flat design and detachable cable, so they're easy to slip into your bag. The HD 400S features a one-button smart remote conveniently located on the cable, 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. Sennheiser dynamic drivers deliver a well-extended sound response with dynamic bass. Brand: Sennheiser Impedance: 18 Frequency response (Microphone): 100 - 10,000 Hz (-10 dB) Frequency response (Headphones): 18-20,000 Hz (-10 dB) Sound pressure level (SPL): 120dB (1kHz/1Vrms), THD Total harmonic distortion: Ear coupling: Over-Ear Jack plug: 3.5mm angled Cable length: 1.4m Transducer principle: Dynamic Pick-up pattern: Omni directional Microphone sensitivity: -44dbV/Pa Acoustics: Closed Sensitivity: 120 dB SPL @ 1 kHz 1V RMS Included in the box: HD 400S around-ear headphones, RCS 400 detachable single-sided cable with 1-button remote and 3.5 mm angled plug