They have some very high-end tuning devices. They have a pro version that is used to tune pianos. It goes for like 5k i think. The vintage model used the same system only it was done mechanically the dials were metal. If anyone has Questions I have had the clip on version probably 4 or 5 months. You need the dials to stop spinning. Then you know you are in tune. These really do a better job with setting intonation. Maybe I am a music nerd but I want the old school one as well.