style:Old Model Product Description The HD 280 PRO is a pair of closed, dynamic stereo headphones that deliver accurate, linear sound reproduction with up to 32dB of ambient noise attenuation for critical monitoring applications. Optimum impedance ensures universal compatibility, from home listening to studio monitoring. The space-saving design features collapsible, rotating earcups that are very comfortable to wear, even if used for long periods of time. From the Manufacturer 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. Collapsible design and swiveling ear cups offer maximum flexibility Accurate, Linear Sound for Monitoring Applications The HD 280 PRO is a pair of closed, dynamic stereo headphones that deliver accurate, linear sound reproduction with up to 32dB of ambient noise attenuation for critical monitoring applications. Optimum impedance ensures universal compatibility, from home listening to studio monitoring. The space-saving design features collapsible, rotating earcups that are very comfortable to wear, even if used for long periods of time. User-Replaceable Parts The Sennheiser HD 280 PRO features rugged construction with user-replaceable parts, including the cable and the earpads. The single-sided, coiled cable has a 3.5mm mini jack and comes with a locking 1/4″ adapter for home or studio stereo equipment. Widely Compatible The Sennheiser HD 280 PRO is compatible with MP3, iPod, DVD, and CD players as well as mobile phones supporting a 3.5mm jack plug. HD 280 PRO also supports (listen only) the latest generation of tablets, from the iPad to the most recent Android tablets and the Blackberry Playbook. It’s also compatible with component home stereos, and recording or studio equipment that uses a 1/4″ plug, thanks to the included locking 1/4″ stereo plug adapter. What’s in the Box? Sennheiser HD 280 PRO Headphones, 1/4″ stereo plug adapter, warranty. Technical Specifications Connection cable: Coiled cable (min1m/max 3m) Contact pressure: 6 N Ear coupling: Around-the-ear Frequency response (headphones): 8 – 25,000 Hz Jack plug: 3.5 / 6.3 mm stereo Load rating: 500 mW Nominal impedance: 64 Ohms Sound pressure level (SPL): 102 dB (IEC 268-7) Total harmonic distortion (THD): 0.1% Transducer type: Dynamic, closed Weight: 7.8 oz (220 g)