An LED is used to show the note name and the meter. The brightness of the light conveys the needle movement in fine detail. When the tuning is exactly right, the left and right LEDs flash along with the center LED. When using the Pitchclip 2, it will be obvious when your instrument is tuned perfectly. Whether you're practicing in a brightly lit room or tuning in dim backstage conditions, this tuner ensures great visibility in nearly any environment.