Eleca Effect Pedal Chromatic Tuner, ECT-3 Chromatic Tuner Pedal with strobe function Easy to read backlit LED widescreen display switchable between standard readout and strobe Scale: 12 Equal-Tempered Notes Range: A0- C8 (27.5Hz- 4186Hz) Calibration Range: 436Hz- 444Hz (1Hz Steps) True Bypass Heavy Duty Die Cast Metal case Case Dimension: 5.45"x 4.31" x2.54" Case Weight: 12 OZ Power: 9V DC (Battery not included)