When you fire these fans up, they go through a seemingly-random (but in fact preprogrammed) sequence of colour changes. At first, a pleasant blue and red transition washes over the fan. Then, a frantic flashing of different colours ensues. Actually, I'm not sure if the name is correct for this fan. A rainbow to me is something colourful for sure, but static in its beauty - tranquil and unmoving. This is more like a disco fan or pill-popping raver fan!



Link: OCAU