*Headphone description   Speaker diameter:40mm Impedance:16 ohms Sensitivity:104+/-2dB, S.P.L. at 1kHz Frequency response:20Hz-20,000Hz Cord length:2.5m Plug type:3.5mm stereo   *Microphone specifications:   Dimensions:6*5mm Directivity: Omnidirectional Impedance: low impedance Sensitivity:104+/-2dB, S.P.L. at 1kHz Frequency response:20Hz-20,000Hz Rated voltage:3V   *Microphone description:   Adjustable headband,wear comfortable With the function of noise cancelling Omni-directional microphone for clear voice pick-up Soft cushion earcup for maximum comfort With volume control in line RoHS,CE Double blister packing                              

HJD-FE2800 Computer Headphone product offered by Shenzhen Hongjieda Technology Co., Ltd