Roland GO:PIANO88 88-Note Digital Piano with Onboard Bluetooth Speakers - Manual (Page 10)

You can set the tempo in the following ways:
Press and hold [FUNCTION] or [METRONOME], then press one of the
[TEMPO] keys to set the desired tempo.
Press and hold [METRONOME], then press the keys marked [1~9~0]
to set the tempo value. For example, press [0], [6], [4] in sequence to
enter a tempo value of 64.
This function adjusts the pitch of the instrument in 0.1Hz increment
over a range of 415.3Hz ~ 466.2Hz.
Press and hold [FUNCTION], then press one of the [Tuning] keys to
adjust the pitch of the keyboard.
For example, if you press and hold [FUNCTION], then press the key
marked [440], it will set the tuning to 440Hz.
Master Tuning
Tempo
10
The transpose function allows the overall pitch of the instrument to be
transposed up or down in semitone steps, over a range of -6 ~ +5.
Press and hold [FUNCTION], then press one of the [Transpose] keys to
set the transpose value.
For example, set the transpose value to -5, you will hear “G” pitch when
playing the “C” keys.
Press and hold [FUNCTION], then press the black key in the [Transpose]
keys to restore the default setting.
Transpose
Parameter
+1
-1 Description
To raise the overall pitch by 1 semitone.
To lower the overall pitch by 1 semitone.
Parameter
+0.1Hz
-0.1Hz Description
To raise the pitch by 0.1Hz.
To lower the pitch by 0.1Hz.