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

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

[SET Hold] will appear and then the time zone setting will flash.

2.Press the (C) button 9 times until the current setting ([KEY♪] or [MUTE]) will flash on the display.

3.Rotate the rotary switch to display [KEY♪] or [MUTE].

[KEY♪]: Operation tone enabled.

[MUTE]: Displays the mute indicator and disables the operation tone.

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