Closed design with a custom sound slider to alter the sound pattern and bass level to your preference</br>Includes detachable single button remote control with high quality microphone</br>38 ohm impedance for max volume with all portable players and smartphones</br>Includes hard carry case for easy storage</br>2-year manufacturer warranty only when purchased from an authorized beyerdynamic dealer.</br></br>Product Description</br></br>The Custom Street is ideal with mobile phones?? mobile players or a stationary PC at home. A special feature of this headphone is the changeable sound which can be selected in three stages from a clear?? analytical sound to a rich bass via the "STOM Sound Slider" bass reflex vents at the housing shells. Another property of this "CUSTOM Sound Slider" feature is the more they are closed?? the more they attenuate ambient noise considerably. Vice versa no music will penetrate to the outside which could disturb people in the vicinity. The CUSTOM STREET f