Noisy microphone, without a calibration file.
Between work, I forgot to send it back. It is noisy for audio recording and no calibration file for measurement.
I do not find this mic suitable for recording as a room mic due to the noise. For Louder sessions it can be ok. Yet, to record quiet sources or ambient it is noisy.
I'm not saying it is completely useless without calibration file. But, I do not understand why there is two versions of this and why we cannot buy calibration file afterwards if it costs money. They could sell one version and we should be able to buy the calibration file afterwards if we want in sake of convenience.
So, in summary; this is not the worst mic or completely useless. However, you should be careful if you want to do things by book.