闹钟 (nào zhōng): alarm clock

Every night before going to bed, I set my alarm clock for 6:30 a.m., so I won't be late for work the next day.

I wanted to sleep in on the weekend, so I turned off my alarm clock, and as a result, I slept until noon.

The alarm clock rang three times, but he didn't hear it. In the end, I woke him up.

This phone app can be used as an alarm clock, and you can also set different ringtones.

On the morning of the exam, my alarm clock ran out of battery. Luckily, my mom woke me up in time.

He is used to putting his alarm clock on the bedside table so that he can reach it easily.