Specifications: Microphone Material: Steel + Zinc Alloy Microphone Stand Material: Metal Sound Card Material: Metal Polar Pattern: Uni-Directional Frequency Response: 20Hz-20KHz Sensitivity: -34dB±2dB (0dB=1V/Pa at 1KHz) Output Impedance: 150Ω±30% (at 1kHz) Load Impedance: >=1000Ω Equivalent Noise Level: 16dBA Max.SPL: 130dB (at 1KHz<=1% T.H.D) S/N Ratio: 78dB Electrical Current: 3mA Sound Card Power Supply: Built-in Lithium Cell (Included) Package Size: 430 * 270 * 90mm / 16.93 * 10.63 * 3.54in