Power through your tasks with a premium keyboard and mouse combo. Advanced features like smart backlit typing and a speed-adaptive scroll-wheel give you an edge as you work. Advanced Backlit Typing. Large, concave, laser etched keys with illumination and Logitech PerfectStroke key system for all day typing comfort. Mouse Anywhere, even on glass.The Darkfield Laser sensor tracks flawlessly where standard mice fail. Work with precision on glass1 and glossy surfaces.