Very Nice coupler. Very good results with REW and onboard (realtek) soundcard. A little advice, the mic is very, very sensitive, much more than my UMIk-1. So I need to reduce mic volume to 50% on windows 10 mixer to have more stable results. On REW I'm using -21db during measurements.
Needs 2.2V electret mic power to work, but most PC mic inputs already provide that. Won't work with an audio interface though. Message the seller with the serial number for calibration files!