Razer Naga Left-Handed - Ergonomic MMO Gaming Mouse with 12 Programmable Thumb Buttons - 8,200 Adjustible DPI 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 strategy. 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. 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. 8200dpi 4G Laser Sensor. No Razer gaming mouse is complete without a cutting-edge mouse sensor to deliver precision and ultra-responsiveness to your game. The Razer Naga is outfitted with a 32 bit ARM processor which means there's a little computer onboard that is computing everything at an incredibly fast rate.