Razer Basilisk Essential Gaming Mouse: 6400 DPI Optical Sensor - Chroma RGB Lighting - 7 Programmable Buttons - Mechanical Switches - Classic Black With the unique ergonomic form factor of the Razer Basilisk, the Basilisk Essential fits snugly within your palm, allowing for extended hours of comfortable gaming. The mouse also features a multi-function paddle designed to rest perfectly underneath your thumb for customizable button control True 6,400 DPI Optical Sensor Up to 220 inches per second (IPS) / 30 G acceleration Razer Mechanical Mouse Switches Seven independently programmable Hyperesponse buttons Gaming-grade tactile scroll wheel Ergonomic right-handed design with enhanced rubber side grips Razer Chroma RGB lighting