ESD03-Headphone Type Wired, over-ear, closed back-Driver / Emitter Size 50 mm-Frequency Response 20 Hz – 20,000 Hz-Sensitivity 98 ± 3 dB-Impedance 32 Ω ±15%-Microphone Type Condenser, omnidirectional-Mic Sensitivity 38 ± 3 dB-Mic Frequency Response 50 Hz – 1,600 Hz-Cable Length ~1.2 m (±0.3 m)-Connection Interface 3.5 mm audio + 3.5 mm mic + USB (for LED lighting)-Noise Reduction Passive isolation