Pioneer DDJ-SB2 + Headphones + Dual Cable CPU: Intel 2.0 GHz Core Duo/Intel i3, i5, and i7 Core Power Requirements : USB (through computer), rated output 5 V DC 40 mm drivers with rare earth magnets and copper-clad aluminum wire voice coils Circumaural design contours around the ears for excellent sound isolation in loud environments Designed for studio tracking and mixing