1. Display: The display is the main component of the mini digital alarm clock. It is usually a small LCD display, which can display relevant information such as time, date, alarm setting, volume control and other related information.

2. Vibrator: Vibrator is one of the main functions of mini digital alarm clocks. You can remind you to get up by vibration. Electronic vibers or mechanical vibers are usually used to vibrate through spring vibration.

3. Power: Power supply is a basic component necessary for mini digital alarm clocks, and is usually powered by batteries or chargers.

4. Controller: The controller is another important part of the mini digital alarm clock. It is usually a small electronic controller that can control the vibration of the alarm clock and the display of the display.

5. Alarm clock settings: The alarm setting is an important part of a mini digital alarm clock. It can be set through a display screen or controller, including the options of getting up time, alarm clock time, volume, etc.

6. Alarm switch: Mini digital alarm clocks usually have a switch to control the opening and closing of the alarm clock.