【Wooden Digital Wall Clock with LED Digits】Andoolex digital wall clock built with big clear LED digits shows Time, Date, Week, and Indoor Temperature, making it much easier to view at a glance ...

As convenient as it might be to use your phone as an alarm clock, standalone alarm clocks come with all kinds of features that can make waking up — or even going to sleep — a little less painful.

We can tell the time without saying AM and PM though - for this, we use the 24 hour clock. The 24 hour clock always uses 4 digits, and we use this system most often with digital clocks.