beyerdynamic Custom Studio 80 Ohm Closed Studio Headphone Closed reference headphone for control and monitor purposes CUSTOM sound slider - variable bass reflex system CUSTOM Style - versatile changeable design, detachable cable Made in Germany Delivery contents: detachable one-sided cable (3m coiled), screwed 1/4" jack adapter (6.35mm), storage bag, Custom Style Tool, manual, warranty booklet