KORG Chromatic Tuner Needle Meter OT-120 For wind band, brass band, orchestra. Compatible with any concert pitch. 100 hours of continuous operation. Only used once, but will be shipped wrapped in bubble wrap as the box is not available. Product dimensions (length x width x height): 13.9 x 9.7 x 5.9 cm Batteries: 2 AAA batteries (included) Battery type: Alkaline Vertical chromatic tuner with a needle meter for excellent visibility. Widely compatible with transposing instruments and historical tunings. Long-life design allows for extended use.