Speed 1: Wow! Speed 2: Damn! Speed 3: Seriously! I guess I don't need my hair dryer any more. This fan is incredible IN SPITE of it's size. It uses very little power and blows like crazy. However, it is a bit loud - not terrible, but noticeable. Part of the sound appears to be from the blades slightly impacting the side of the case, making an odd scissor-like sound. And the decal under the speed knob won't stay stuck to the case. But I still recommend this fan. It's small, angry, and doesn't eat much.