iPrecisionMic is a precision, professional microphone that is also an iOS direct-connect Lightning accessory. iPrecisionMic is factory calibrated to +/-0.1dB using a NIST traceable pressure-compensated calibrator. The calibration offsets are store in the microphone’s nonvolatile memory, and are transferred automatically to an iOS device running our AudioTools app. Thus, not only is iPrecisionMic accurate, clean, and calibrated, but it requires no setup when connected to our apps. Instant, calibrated SPL measurements. Share it between several users, confident in knowing that it will also give you the same calibrated, reliable results no matter who is using it.