Expert Features: Noise Reduction Technology: Equipped with an AMP1821 IC model for effective noise reduction. Dual Microphone Design: Two microphone heads for enhanced sound capture, providing clear audio. High Sensitivity: Microphone sensitivity of -32dB ± 3dB for accurate sound capture. Broad Frequency Response: 20Hz to 20kHz frequency response for capturing a wide range of sound. Power Efficiency: Low power consumption with a test voltage of 5V-250mA. Long Cable Length: 1.8-meter cord provides flexibility in setup. Expert Specs: IC Model: AMP1821 (Noise Reduction) Cord Length: 1800 ± 10% mm MIC Sensitivity: -32dB ± 3dB Frequency Response: 20Hz - 20kHz Dual MIC Dimensions: Ø 9.6 * 6.7mm, Ø 16 * 6.3mm MIC Impedance: 2.2kΩ MIC Test Voltage: 5V-250mA