Specification: 3.5mm plug boundary condenser microphone; the microphone wire is about 5ft / 1.5m long Functional Characteristics: frequency response is 40Hz - 16KHz. Ultra-clear transmission of voice signals, adopt capacitive core, effectively reduce noise and improve recording quality, pick up the sound from 360-degree Our conference call microphone is metal protective filter mesh, using electrophoresis technology that is green environmental protection