An alarm clock is an electronic device that usually has an LCD display and one or more buttons or switches for setting the time, date, alarm function, etc. The display typically shows the date and time in 12-hour format (2 digits) with a 24-hour clock (sometimes also with 12- hour format).
These devices are mainly used to provide audible alerts for anyone who wishes to wake up at a set time or after a designated period of time.
Additionally, an alarm clock provides a user a way to stay on schedule and in sync with their daily activities. Mornings can be hectic for many people, but the alarm clock can help put someone into the right mind set. There are many benefits of using an alarm clock, from getting more sleep when one needs it to staying organized.