Roland GO:PIANO88 88-Note Digital Piano with Onboard Bluetooth Speakers - Manual (Page 9)

Press and hold [FUNCTION], then press one of the [Reverb] keys to set
the reverb level range from 0 to 10.
Press and hold [FUNCTION], then press the black key in the [Reverb]
keys to restore the default setting. When the reverb level is set to "0",
there will be no reverb effect.
Reverb
09
The metronome provides a steady beat to help you practice at a preset
tempo.
Turn the metronome on or off.
Press the [METRONOME] button to turn the function on or off. When the
metronome is in use, the button indicator will flash in sync with the
current tempo.
Change the metronome beat.
The instrument provides 6 beat types: 0, 2~6.
Press and hold [FUNCTION] or [METRONOME], then press one of the
[BEAT] keys to set the metronome beat.
Press and hold [FUNCTION] or [METRONOME], then press the black
key in the [BEAT] keys to restore the default setting.
Press and hold [METRONOME], then press a key [A0] ~ [D1] to select a
beat type. Please refer to List of Operations (Button + Key) for details.
Adjust the metronome volume.
Press and hold [FUNCTION] or [METRONOME], then press one of the
[VOLUME] keys to set the volume range from 1 to 10.
Press and hold [FUNCTION] or [METRONOME], then press the black
key in the [VOLUME] keys to restore the default setting.
Metronome