Razer Naga Expert 2014 MMO Gaming Mouse (Certified Refurbished) [video game] This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90-day warranty The Razer Naga's revolutionary 12 button thumb grid has been outfitted with mechanical switches to give you tactile and audible feedback, so you can be assured of every actuation. This iteration of the Razer Naga features an all-new one-size-fits-all ergonomic form factor to ensure your hand fits snugly for maximum comfort. The scroll wheel on the Razer Naga now goes left and right, as well as up, down and in for more buttons at your disposal, whether for destroying games or navigating a lengthy forum for the best MMO starts. Introducing the most intuitive mouse configurator you'll ever need for MMO gaming. Customize each and every button on the Razer Naga to your personal skillset, macros and hotkeys right from in the game via a non-intrusive overlay.