1、In Line Control: Wired telephone headset with stylish design, you can answer, hang up, volume up or down by simple in line control. 2、Clear Sound: This telephone headset has a broadband noise reduction capability, easily restore the call effect and keep the sound quality clearer. 3、Ergonomic Design: Business headphone with microphone, can be rotated 330 degrees, accurate positioning in the most suitable position to ensure that the call sound quality. 4、Noise Canceling Mic: Business headphone configured with noise canceling microphone, can filter high and medium frequency noisy noise, to achieve clear calls. 5、Soft And Comfortable: Binaural office headset with artificial protein leather ear cushions, close to the skin, soft and comfortable to prevent allergies. 6、Adjustable Headband: Lightweight steel bar headband with adjustable length and curvature according to head size. Black carbon steel grain arm, more beautiful. Item Type: Telephone Headset Material: ABS, Protein Leather Speaker Unit: Moving Coil Type NdFeB Magnetic Speaker Speaker Outside Diameter Size: Approx. 28mm / 1.1in Speaker Frequency Response: 150HZ-4.5KHZ Speaker Sensitivity: 113±3dB (at1KHz1mw) Speaker Impedance: 150Ω±5% Speaker Distortion: <1% Microphone Directionality: Single Pointing Microphone Frequency Range: 50HZ-3.0kHZ Microphone Sensitivity: -44±3db 1 x Telephone Headset