Type: Headphone Item No.:M8911MV Features: 1) Frequency Response: 20Hz-20kHz 2) Speaker Impedance: 32ohm 3) Driver Unit: 40mm 4) Rated Power: 25mW 5) Power Handling Capability: 50mW 6) Cable Length: 2.25M 7) Sensitivity:108+/-3dB 8) Microphone: 6?mm-58dB+/- 2dB 9) Plug: 3.5mm, Microphone in Red, Earphone in Black