- Built-in piezo vibration sensor for accurate tuning

- Built-in microphone for tuning acoustics

- Back-Lit illuminated LCD display

- Screen displays Red when you're flat/sharp and blue when in tune

- Flat mode tunes down to 4 flats for use with capo

- Tuning Range: A0 (27.50Hz) ~ C8 (4186.00Hz)

- 'A' Calibration: 433 ~ 447Hz 1 Hz steps

- Accuracy: 0.5 cents

- Battery: 1 x CR2032 coin battery included