This attractive, little fan comes at a very low price, and as is often the case, you get what you pay for. Don't get me wrong; I am glad to have it, but you have to temper your expectations with such a product.
So, with that preamble, you do not get to choose fan speed. There is only one. And it is a weak one. The flow of air has a very limited reach. This fan is fine for a desk or end table where you can have it literally inches away. It's also great to quickly warm your hands or feet.
Don't even think that it will warm a room. This is truly a no-frills, very personal fan, and in that regard it is quite nice. Small, quiet, and heats well at close range.
So there it is.