The hpx4000 provides everything you need for comfortable listening. The two rotating, reversible ear cups contain high-resolution cobalt capsules that deliver every nuance of your sound. Because of the demands of your active lifestyle, we’ve engineered the one-sided cable from the finest oxygen-free copper wire that resists tangling and provides maximum durability. The hpx4000 also comes with a 1/4 adapter for the 1/8 connector, making it compatible with everything from your mp3 player to your mixing console.