The D’Addario Chromatic Pedal Tuner is a simple, precise, and responsive pedal tuner designed to fit easily onto any pedalboard. Its 32-bit processor ensures rapid response and ±0.5-cent accuracy, while the large, vertical color display remains clearly visible even on stage. Its aluminum construction makes it rugged and suitable for live use, while the True Bypass circuitry leaves the signal unaltered when the pedal is inactive. It can be powered by a 9V battery or a 9V DC power supply and offers a calibration range of 415 to 475 Hz. An essential, reliable accessory for guitar and bass, ideal for both stage and studio settings.