I bought an Alphacool, in black, and although when it arrived it was labelled 'Revoltec' it does appear to be the same unit.
I matched it up with Scythe 1600 rpm fans and it worked ok apart from one of the rotary knobs which is far from smooth.
One fan ended up with a bit of a whine which could have been down to the fan.
OcUk didn't offer it at the time so I bought from a competitor for £11.20.
In retrospect I would have happily paid more and hopefully got a better product but choice is limited.
For better or worse it has a blue LED associated with each rotary knob.