TU-3

Tuner

The TU-3 features a smooth 21-segment LED meter with a High-Brightness mode that cuts through the harshest outdoor glare. Choose between Chromatic or Guitar/Bass tuning modes, and enjoy visual pinpoint tuning verification with the Accu-Pitch Sign function. The TU-3 incorporates a convenient Note Name Indicator that can display notes of 7-string guitars and 6-string basses, while the Flat-Tuning mode can support up to six half-steps.

Tuning Range: C0 (16.35Hz)–C8 (4186Hz)
Reference Pitch: A4=436–445 Hz (1Hz step)
Tuning Accuracy: ±1 cent

https://www.boss.info/global/products/tu-3/