Velleman PROMIX22U. Microphone Signal-to-Noise Ratio (SNR): 80 dB, Frequency response: 20 - 20000 Hz, Digital sound processing: 0 bit. Input impedance: 10000 Ом, Microphone input impedance: 1300 Ом. Total Harmonic Distortion (THD): 0.05 %. Power consumption (typical): 11 W. Weight: 1600 g