I changed mine to be always on because I use it for my kid so I want it never to be on. And so it happens that every time I get in the car, I have to get in the front seat to start the car, then in the back seat to turn on the fan, and then back in the front seat to drive. It only hurts a little, so I changed it to be always on. This is nowhere near the most powerful fan in the world. At full power, it's more of a breeze than anything. I would only take this one if you just need some sort of attraction because it's not that strong. This is great for what I need.