1.The appearance is cool, simple and generous 2.High magnetic 40mm speaker, with strong sounding quality 3.Adjustable single-head beam, memory foam combined with fully enclosed sound chamber design, long-term wear without feeling of comfort. Speaker: 40MM Impedance: 32+-15%ΩSensitivity: 108+-3 dBFrequency Response: 20 Hz to 20KHZMicrophone: φ6.0*5.0MMLength: 2.0MPlug: 2 x 3.5MM+USB for the leds