There was a time when we used a desk clocks on our nightstand and set a built-in alarm clock daily, so as not to oversleep. Later they were replaced by mobile phones with built-in alarm, however today we continue to use the alarm throughout the day, since it is much more convenient to watch time on a desktop clock. Why use? You do not need to sleep in the morning before work or do not forget to do something important, because in many cases a desk clock is used. Today, a desk clock on the bedside table not only shows the time, but can even be used as an LED mirror.