Plug in Fan Speed Controller, Dimmer Control, Reducer Hydroponics

Exactly does what it says it does without question. Design and quality very good

I bought two of these and one stopped working after a week but the other is still going strong.

Does the job well

Doesn't work at all, to turn the dimmer switch it just turns on & off no speed control at all.To add insult to injury no paperwork within box to return item either.Would give no stars if I could!