Thermaltake Mobile Fan II

This is Thermaltake's Mobile Fan II, a USB-powered cooling fan. I needed something to provide me with some air as I have classes that are stuck in rooms with nothing but computers and people and yet there are no windows for ventilation so it gets pretty hot... All the reviews I've seen of this thing are good so I decided to get one. It has a 180cm retractable USB power cord which is plenty long, and has a variable resistor to control the fan speed.