Screw-on cardioid microphone capsule module, only for GN / HM modules, W30 windscreen included From The Manufacturer: The CK31 is a high-performance condenser microphone capsule with a wide cardioid polar pattern, especially designed for inexperienced Description: The CK31 is a high-performance condenser microphone capsule with a wide cardioid polar pattern, especially designed for inexperienced speakers and applications where more than one person uses the microphone in turn. The CK31 capsule is integrated in a rugged metal housing and fits any mounting module of the DAM Series. To prevent contact problems, the capsule is equipped with large-area, self-cleaning, gold-plated contacts with deep threads to prevent misalignment and ensure extra-long life. The package includes a special two-part windscreen, which efficiently reduces wind and pop noise. Specification: Audio frequency bandwidth 50 - 20000 Hz Equivalent noise level 21 dB-A Sensitivity 20 mV/Pa Signal to Noise 73 dB-A Electrical impedance 600 Ohms Recommended load impedance 2000 Ohms Polar Pattern Cardioid Height 20 mm Diameter 13.5 mm Net Weight 5 g Finish matte dark gray Type Modular Series Standard Voltage 9 to 52 V Current 3 mA