Beyerdynamic TG-I53c condenser microphone microphone type: condenser (back-electret)operation: pressure gradient pickup pattern: cardioidfrequency range close range: 20 - 20,000 Hzdistant range (measured at 1 m): 35 - 20,000 Hz open circuit voltage: 6.8 mV/Pa (-43.4 dBV) ±2.5 dBnominal impedance: 200 ohms (during use: > 1 ohm)