Headphone Characteristics: Speaker Diameter : 40 mm (neodymium magnets) Frequency Response : 20 Hz–20 kHz Nominal Impedance : 32Ω±5 Sensitivity : 112dB±3dB Nominal Input Power : 20mW (5V DC/150mA) Microphone Characteristics: Microphone Type : Condenser Nominal Impedance : 2.2 kilohms Frequency Response : 100 Hz–10 kHz Sensitivity : -42+/-3dB Weight : 365g Cable Length : 2m Connection : USB connector