0% Effective
There's no on/off toggle, but that doesn't matter bc there is no appreciable difference between when it's plugged in and not. No sound. No air movement. Just a red dot. That's what I paid for. A red dot. It's not a one off, as I bought three of them and they all do nothing whatsoever. Had them plugged in for days, now. No difference.<br />Don't waste your money; I wish I hadn't.
Rating: 1 stars