Seiko ST01 Chromatic Guitar Tuner Fashions: Auto Tuning Voice range: Chromatic, A0 to C8, tones = C, C sharp, D, D flat, E, F, F sharp, G, G sharp, A, B, H Pitch Shift: A4 = 440Hz Built-in microphone, LCD display, note display, automatic switch-off, memory function, 1 LED tuning guide Incl. 1x lithium battery CR1220, operating instructions