Sennheiser HD 599 Open Back Headphones - Over Ear - Open Back Design - 12- 38,500 Hz Frequency Response - 50 ohm Impedance - 106dBSPL (1kHz/1Vrms) Sound Pressure Level - <0.1% (1kHz, 100dBSPL) Total Harmonic Distortion - Includes: 3 metre Cable with 6.3mm Straight Plug, 1.2 metre Cable with 3.5mm Straight Plug, 6.3mm to 3.5mm Adaptor - Replaceable Ear Pads - 2 Years Limited Warranty - 506831

Manufacturer Warranty: 2 Years Limited Warranty

Manufacturer Contact Info: http://www.Sennheiser.com/,