I set the alarm clock for 7 o'clock.

我把闹钟定在7点钟闹响。

《牛津词典》

Try to set the alarm clock for the same time every morning-including weekends.

每天早上的闹钟都要设成相同的时间间——周末也是。

youdao

If he set his alarm clock for midnight, it would wake the whole house.

如果他把闹钟设定在午夜，铃声会把全家人都吵醒。

《柯林斯英汉双解大词典》

An Off Timer allows you to set an alarm clock to turn of the monitor automatically, and the eSaver feature lets you preset power conservation modes for the display when the PC is not in use.

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