Velleman PROMIX100. Microphone Signal-to-Noise Ratio (SNR): 50 dB, Frequency response: 20 - 20000 Hz, Digital sound processing: 0 bit. Input impedance: 22000 Ом, Microphone input impedance: 10000 Ом. Total Harmonic Distortion (THD): 0.1 %. Weight: 985 g. Dimensions (WxDxH): 270 x 180 x 45 mm