The Sonwarworks SoundID Reference Measurement Microphone is an omnidirectional measurement microphone with an individual calibration profile. Every microphone has been measured by Sonarworks acousticians against an ANSI-certified measurement microphone. This means perfect accuracy within the audible range and freedom from sample-to-sample irregularities. It is an individually-calibrated XLR measurement microphone that requires phantom power. It does not include software.