The CM-125 consists of the MA-20 mic carrying bag, mounting clip, and windscreen plus the CM-25 individually calibrated everyday measurement microphone. The CM-25 is the CM-20 ¼” back electret, omni-directional microphone individually calibrated with a provided file in FRD format with one-third octave measurement points from 5 Hz to 25 kHz. The file comes on a serialized USB memory stick for convenience.

Now you can have the bargain priced CM-20 professionally calibrated in this nifty carrying bag with windscreen and mic clip for a remarkable price.