Speaker diameter: 40mm Sensitivity: 115db S.P.L at 1khz ,Range of frequency response: 20hz-20, 000hz

Speaker diameter: 40mm Sensitivity: 115db ± 3 S.P.L at 1khz Impedance: 32Ω Range of frequency response: 20hz-20, 000hz Rated Power: 20mw Wire length: 2.2m ± 0.3m Microphone Unit: 6 * 5mm-42db ± 3db Pin: Stereo 3.5mm

computer headphone