The HA-40 has a detection range of C1 @bbbbb (24.500 Hz) to C8 (4186 Hz), and also allows you to tune sharp or flat relative to standard pitch. You can also adjust the pitch up or down in semitone steps and tune your instrument with a capo still attached.

The HA-40 supports a variety of tunings for Hawaiian instruments, two modes for ukulele and five for steel guitar. For the ukulele, the HA-40 provides LOW-G tuning suitable for solo performance as well as D tuning (American tuning) which raises the conventional C tuning by one step. A broad range of pitch detection is also supported allowing you to even tune steel guitars that have more than six strings.