Direct Sound EX-29 Dynamic Closed Headphones Black w/10' Headphone Extension Cable Dynamic closed back headphones with closed back drivers Straight stereo 1/8" (3.5 mm) gold-plated with screw-on 1/4" (6.3 mm) gold-plated adapter IncrediFlexpadded, fully adjustable headband; foldable for storage Environmentally responsible natural passive isolation  no batteries required