For those who use USB hubs or may have one end of the cable closer than the fan, having the switch behind the fan is a problem. Prefer to have a switch like the built in control on the cord. The power is weak. The air moves very quietly and yet gently. So as not to disturb the air. ha ha. I bought it to cool my hard drives, those in external bays, etc. I have used many fans and bought many from Revain. Lately there have been problems finding real air motors. Like a gentle breeze, this fan is just inches from your face. Continue. nothing to feel