Multi-media headset. 1. Good looking and wearing comfort 2. Excellent sound effect, clear sound quality 3. Stable and durabl SpecificationHeadphone:Sensitivity≥96dB at 1KHz, 1mWFrequency Response20 to 20,000HzImpedance32 ohmMicrophone :Sensitivity-42dB±2dB at 1KHz, 1V/PaFrequency Response100 to 10,000HzImpedance2200 ohmCable length1.2m / 1.8m HL-380 Multimedia wired headphone