Aiming at meeting the demand of modern peple, the Monster iBeats Bieber Limited Edition Headphones are designed as sleek, amazingly compact in-ear. Because of exclusive Monster divers, the headphones can deliver all kinds of sound. The purest sound can be heard from the Monster iBeats Headphones for its solid metal housing. Monster ControlTalk with built-in mic are excellent for convenient hands-free calling and music playback controls.