Stereo headphones with microphonededicated to smartphones, tabletshigh-end drivers guarantee crystalline sound"smart button" - used to answer, end calls, play and pause musicquick folding of headphones makes it easy to travel mini 4-pin jack 3.5mm (in/out in one connector)frequency response: 20Hz-20kHzimpedance: 32 ? ±15%sensitivity: 105±3dBcable length: 1.6± 0.15mspecial profile cable that protects against tanglesspeaker diameter: 40mm