Sennheiser HD 600 Open Back Professional Headphone Lightweight aluminum voice coils ensure excellent transient response Neodymium ferrous magnets maintain optimum sensitivity and excellent dynamics Sophisticated design, elegantly finished in black and gray High-quality open metal-mesh earpiece covers Detachable, Kevlar-reinforced oxygen-free-copper cable with very low handling noise Connectivity technology : Wired Note: The unit ships with the Adaptor on the cable