Good dimmer but no speed control.
It has a clean circuit board. Quite steep curve for lowering voltage, probably about 1/3 to half a turn. The beefy radiator connected to what it seems like a lirge triac. Won't heat in use, but also won't change the actual speed on my motor. It either start at full or not at all.
At measuring, still does what it says: dimms the voltage steppless from 230 to 0.
Overall: mixed feelings.
Doesn't do what I hoped: speed control, but does dimming.
Still, good value for the price.
Verified purchase: YesCondition: New