1、WIDE BAND HD SPEAKERS: Computer headset uses wideband HD speakers to optimize the sound of the voice band, showing the perfect sound quality of the human voice. 2、180 ROTATING STRUCTURE: 180 rotating structure precisely adjusts the fit of the speaker to the ear, so it fits the ear and can be placed flat when you take it off. 3、NOISE REDUCTION: Call center headset adopts professional microphone noise reduction technology, which can block out 90% of background noise. 4、SOFT AND LIGHT: Office headset features a high tenacity steel bar headband with adjustable length. With simulated protein leather earcups, soft and light. 5、HEARING GUARD: Single ear headset uses international standard hearing guard to effectively prevent sudden high decibel sound damage to the ear. Item Type: Single Ear Headset Material: ABS, Protein Leather Speaker Unit: Moving Coil Nd Iron Boron Magnetic Speaker Horn Outer Diameter Size: Approx. 28mm / 1.1in Horn Frequency Response: 150HZ-4.5KHZ Horn Sensitivity: 113dB±3dB(At1KHz1mw) Horn Impedance: 150Ω±5% Speaker Distortion: <1% Microphone Directionality: Single Pointing Microphone Frequency Range: 50HZ-3.0kHZ Microphone Sensitivity: -44±3db 1 x Single Ear Headset