Tuning comes full circle in this strobe tuner! The Korg DT-4 is a uniquely styled chromatic guitar tuner with LEDs around its circumference, indicating how close the input pitch is to the note name displayed in the center. In spite of the compact size of this strobe tuner (fits in the palm of your hand), the illuminated circumference and large note name display provide excellent visibility, allowing high-precision tuning over a range of A0 (27.50 Hz)-C8 (4186.01 Hz). The adjustable calibration lets you specify the reference pitch in a range of 410 Hz-480 Hz (1 Hz steps).