- Cooling fan
The DFN-04 fan is truly unique in that it is powered by a USB rather than a traditional plug. The slim and modern design is ideal for personal use while surfing the web on your laptop or desktop computer. Simply plug directly into your computers USB port to power. Fan even folds flat making it easy to store. Although this model is only 4" it still produces a powerful flow of air. Like all Royal Sovereign fans it comes with a protective safety guard.