ICONIC ERGONOMIC FORM WITH 10+1 PROGRAMMABLE BUTTONS: Favored by millions worldwide, the mouse’s signature shape perfectly supports cutting-edge ergonomics and endless customizability options 13-ZONE CHROMA LIGHTING WITH FULL UNDERGLOW: Customize each zone from over 16.8 million colors and countless lighting effects, and experience greater immersion as they react dynamically with over 150 Chroma-integrated games.