‌The HD 280 Pro is Sennheiser's most significant closed, around-the-ear headphone to be introduced in years. Designed to exceed the demands of the professional environment, the HD 280 Pro boasts extremely robust construction combined with the sound quality, modular design and aggressive noise isolation the necessary in the field. The unique collapsible design, combined with swiveling ear cups, offers maximum flexibility in any application. Key Features High ambient noise attenuation Accurate, linear sound reproduction Soft earpads for a comfortable fit Folding and rotating earcups for space-saving transport Tough, single-sided cable Color                                                      black Wearing style                                         Headband Frequency response (Headphones)      8 - 25000 Hz Sound pressure level (SPL)      113 dB THD, total harmonic distortion  0,1 % Contact pressure                     6 N Ear coupling                             circumaural         Jack plug                                  3,5 / 6,3 mm stereo Connection cable                     Coiled Cable (min. 1.3m / max. 3m) Transducer principle                 dynamic, closed Weight w/o cable:                                 285 g Nominal impedance                  64 Ω Load rating                                500 mW