techPowerUp posted a review on the Vizo Ninja II Sumo Notebook Cooler
A quote from the article:
Vizo Ninja II Sumo Notebook Cooler Review
The Vizo Ninja II, lovingly called Sumo because of the large size, is intended for 15" to 17" notebooks. The two cooling fans are powered by a USB port of the portable computer. This cable also features an USB 2.0 port itself, so you will not waste one of these precious connection on your laptop.
Vizo Ninja II Sumo Notebook Cooler Review