Silvercrest SH-100 Instructions Manual page 127

Silvercrest SH-100
Press the menu or the call key to access the Call Time
Reminder. To switch the function off, press the menu or the call
key again and then select "Off".
Single:
Press the menu or the call key to access the Call Time
Reminder. Press the menu or the call key again and then select
"Single". A beep then sounds once when the set call time is
reached. The call time can be set within the range of 1 second to
3,000 seconds.
Periodic:
Press the menu or the call key to access the Call Time
Reminder. Press the menu or the call key again and then select
"Periodic". A regular beep then sounds when the set call time is
reached. The call time can be set within the range of 30 seconds
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