<https://www.anandtech.com/show/14350/viper-gaming-launches-v550-and-v551-gaming-mice>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://awww.anandtech.com/show/14350/viper-gaming-launches-v550-and-v551-gaming-mice>