In the heel-down position, the pedal’s vibrant touchscreen automatically enters tuner mode, allowing for silent tuning. As the foot sweeps forward, the screen switches to volume mode, providing a graphic display of your volume level. Alternatively, the screen can remain in volume mode or tuner mode, regardless of the pedal’s position in the sweep. Simply double tap on the touchscreen to toggle between modes. The VPJR Tuner provides the same rugged construction and time-tested performance as Ernie Ball’s traditional volume pedal, resulting in the most useful guitar tuner pedal on the market.