This Hybrid dual (Balanced Armature + 8mm)drivers, Hi Resolution headphone comes in a balloon-shape metal sound chamber. It has a high quality Balanced Armature driver plus a high quality 8mm dynamic driver to provide stable and balanced sound throughout treble to bass without distortion. It gives brilliant performance to all kind of music. It features noise isolation, PRS (Pressure Relief System) with medical grade ear pads for long wearing comfort, tangle free high quality flat cable with inline microphone. It is compatible with Apple, Android smart phones and tablets devices with 3.5mm audio jack.