Binary Clock with Red Lights

Do you know this Clock?

Even I know it is a clock, I can not read it.
It is a Binary Clock. So cool.

Tell time in hi-tech style with this incredible Powers of 2 BCD Clock! It uses the binary code (the language of computers) to indicate the time. After a few minutes of practice, you'll be able to tell the time by simply adding the values of the red lights in each column. This compact unit is not a typical light show, it's actually a working clock!

Here is a guide tells you how to read a Binary clock.