Thank you for viewing this product. This is a new, unopened item. Sennheiser HD 599 Open-Back Headphones, Ivory [Domestic Genuine Product] The top model of the HD 500 series, these premium headphones deliver clear, crisp sound from high to low frequencies, allowing you to experience overwhelming high-quality sound. With a spacious soundstage and transparent, natural sound, they beautifully reproduce any music genre. Type: Dynamic, Open-back Frequency Response: 12 ~ 38,500 Hz Impedance: 50Ω Sensitivity: 106dB Included Cable 1: 3.0m (single-sided, left), 6.3mm stereo standard plug (straight type) Included Cable 2: 1.2m (single-sided, left), 3.5mm stereo mini-plug (straight type) Other Accessories: 3.5mm adapter, 1.2m 3.5mm connection cable