The Razer Naga Chroma multi-colour MMO gaming mouse makes late night raids, intense guild battles, and exciting dungeon crawling even more fun for MMO gamers. The Razer Naga Chroma's original 12 button thumb grid is outfitted with mechanical switches to give you tactile and audible feedback. The thumb grid's buttons have a concave shape to allow each button to stand out individually, letting your instincts and reflexes lead you to victory.