Simulation leather headband pad and earmuffs, wear a long time without feeling of oppression Earmuff filled high elastic sponge, completely eliminate the phenomenon of clamping ears High sensitivity to noise canceling microphone, can eliminate the environmental noise interference Mic Dimensions : 6.0 x 5.0mm Sensitivity : -62dB+/-3dΒ Directivity: omnidirectional Impedance: 2.2 KΩ Speaker diameter : 50.00mm Impedance: 32 Ω Frequency response : 10-20000Hz Sensitivity : 105dB+/-3dΒ Max input power: 30mW Cord length : >/=2.2m