Built-in high sensitive microphone large diameter, so that the call clarity free of noise. Advanced noise reduction technology for enhanced audio quality, recording the same perfect. New mold, unique personality. High stability of the chassis, can make a smooth microphone stand. Sturdy design, adjustable call you the best location. Micro unit: 6* 5mm. Micro directivity: omnidirection. Micro sensitivity: -58±3dBdB S.P.L.at 1KHz. Micro impedance: 2.2kΩ. Frequenct response: 30Hz-16,000Hz. Standard operating voltage: 3V. Cable length: 2.4± 0.15m. Plug type: 3.5mmstereo.