Tall Dots is a follow on from Dots and it tells time to the nearest 5 minute interval after each hour. 
 
How to Tell the Time (the video below shows the clock at 10:30)

At rest the clock "beats" slowly by lighting a single LED that progressively moves from bottom to top before starting all over again at the bottom. Lets assume the time is 10:30. To tell time start by touching the stainless steel sensor that is just below the column of white dots.  Tall Dots now displays the hour by sequentially lighting LEDs from the bottom up to the top until 10 LEDs are lit. Once all 10 LEDs are lit they darken. Following a brief pause 6 LEDs sequentially light up to display the 5 minute component of time (6x5=30 minutes).  These 6 LEDs now darken and the clock goes back to slowly pulsing with a single dot until the next time it is activated with the touch sensor.