Product review (2 stars): Stopped working after a few minutes
Was cheap, fit fine and worked.  For 5 minutes.  Now it is completely dead.  I tested the switch output with a multimeter, sensed voltage on the fan's wiring with a voltage sniffer, the problem is definitely the fan's motor.  My time lost messing with this thing is more valuable than the few bucks I saved.  My recommendation is to look somewhere else.