xtraem H2000 Pro Series Studio Style Headphone High performance digital stereo headphones with ultra-bass drivers, and soft padded earcups that keep sound in; adjustable custom fit conforms to the shape of your head Listen to music and talk to friends with in-line click control microphone; easily fast forward, play, pause and rewind music, adjust volume, hang up and answer calls Drive unit diameter - 40mm; noise isolating Frequency: 20Hz - 20kHz; Impedance: 32 +/- 3 ohms; Sensitivity: 103dB +/- 3dB 4-foot long tangle proof flat cord with 3.5mm plug