Use the procedure below to enable or disable the button operation tone.

1.Hold down the (A) button for about two seconds.

[SET] will appear first, followed by the Home Time City name.

2.Press (D) twice until the current setting ([KEY♪] or [MUTE]) flashes on the display.

3.Press (E) and the current setting ([KEY♪] or [MUTE]) will appear on the display.

[KEY♪]: Operation tone is enabled.

[MUTE]: Operation tone is muted.

4.Press (A) twice to exit the setting screen.