Mode: occluded-ear earphone, supra-aural Earphone&headphone with or without microphone Mode: occluded-ear earphone,supra-aural Earphone&headphone with or without microphoneFrequency Response: 20~20,000Hz Impedance: 16~32 Ohms Sensitivity(S.P.L): 103dB±2dB/mW(at 1KHz) Rated Power: 5mW Jack: Ø3.5mm Cord Length: as your requireStandardHROS etc.OEM is accepted Earphone&headphone