Korg Pitchblack Advance, pedal-shaped tuner, color mode 12 notes, frequency range E0 (20.60 Hz) – C8 (4186 Hz), calibration setting 436 – 445Hz, accuracy +/- 1 Cent, regular display, strobe, half-strobe & mirror, input-output connection with jack, true bypass function, DC 9V input and output for operation with adapter (optional), operation with 9V battery with a maximum duration of 60 hours, weight 257 gr.