Havit H763D 3.5MM Gaming Headset . Speaker 40MM Impedance 16±15%ΩSensitivity 108±3 dBFrequency Response 20 Hz to 20KHZMicrophone φ6.0*5.0MMLength 1.8MPlug 2X3.5MM(1X3.5MM). Surround sound, external noise reducing, with metal wire mesh and cool red led light which brings you small family theater experience.Stretchable head beam design,suitable for different users, which can adjust the headband to the best status.Omnidirectional microphone which make the call more clearly40mm large caliber speakers, brings broad sound field and strong bass. Shocking sound gives you a sense of reality.Soft cortex earmuffs, soft and delicate, can reduce the hearing impairment.High precision and smooth wheel volume control, enables you to control the volume as you like.