User's Manual

[Alerts]
Please refer to [Ringer].
Select [Key Tone], you will see:
Select [Return] to turn back;
Select [Normal] will play a short key tone even when the key is pressed;
Select [Long] will play a continuous key tone when the key is pressed, the key tone will stop if the
key is released.
Select [Alerts], you will see:
Alerts menu is for setting of alerts, you can switch it On/Off in its sub-menu, which may see like
this: