For music listening on-the-go as well as private listening at home, the AHD-1001 features Denon's exclusive Microfiber diaphragm technology, with an ultra lightweight radiating surface that provides a frequency range that extends well above the range of human hearing for crystalline clarity. To eliminate the colorations caused by sealed-back enclosures, the AHD-1001 also features Denon's Acoustic Optimizer design, for the most natural, uncolored sound quality. The adjustable headband features comfortable ear cushions with soft internal padding, while the over-the-ear design provides comfortable isolation from outside sounds, and the unit's light weight (only 180 grams - 6.3 ounces) ensures fatigue-free listening. For on-the-go listening, the AHD-1001 comes with a 1.5 meters audiophile grade OFC oxygen-free copper cable featuring equal length L/R cable design, along with a convenient carrying pouch. For home listening, a 3.5 meters extension cable is also provided, extending the total cable length to a full 6 meters (19.7 feet). Two cable lengths - 20 and 31 extension, with cable clip Supplied with soft silicon earpads in three sizes (S, M, L) and a moldable soft foam earpiece for optimum fit and comfort Gold-plated 3.5mm mini plug, compatible with all iPhone models