Weight: 57g, Cable length: 2m, Headphone: Driver: ustom dynamic, 50mm with neodymium magnets, Type: Circumaural, Closed back, Frequency response: 13Hz– 27kHz, Impedance: 65 Ω, Sound pressure level: 99dBSPL/mW at 1kHz, T.H.D.: ≤ 1%, Weight: 310g, Weight with mic: 321g, Connection type 3.5mm plug(4pole), Element: Electret condenser microphone, Polar pattern: Bi-directional, Noise-cancelling, Frequency response: 50Hz – 18kHz, Sensitivity: -38dBV (0dB=1V/Pa at 1kHz)