This microphone is comes with a calibration file for use with the ETF or BARE software. While the BARE software works equally well with the Radio Shack analog SPL meter, the ETF benefits particularly in the high frequency range with this microphone. We have found this microphone to be extremely accurate and reproducible over time.
With the calibrated microphone comes a matched MP-1r pre-amplifier. It operates on a single 9 volt battery, and provides gain control for optimizing the input level of the microphone into your computer's sound card.
Cables are not included with the microphone and pre-amp. We do offer a special cable packages for use with this unit.