R180 with excellent sharpness and transient response, dynamic range, low distortion, can withstand up to 100 db sound pressure level of the input. Whole structure of copper core shell structure of the condenser microphones and copper parts. To ensure the precision of acoustic performance and the use of harsh environment. With a 110 hz low cut switch control, more flexible apply. Condenser microphones core small earthquakes film with cardioid directivity, specially designed for chorus performance, sound pickup range wide, high sensitivity. Is absolutely chorus performance engineering tool.