Harley Benton Dr. Chord Pro - chord finder with chromatic tuner and metronome, 2640x chords, right and left-handed chords, chord searching (finger positions on guitar fretboard and chord name for one set of specific finger positions), chromatic tuner, tuning range: A0-C8 (27.5-4186.01Hz), tone generator: C4-B4 (32.7-493.883Hz), calibration: 430-450Hz, metronome with 30-250bpm tempo range, headphone output, auto power off, integrated microphone, powered via 9V battery (included) or optional power supply. Dimensions: 120 x 70 x 28mm (WxHxD). Weight: 150g (including battery).