The keyboard features six programmable G-keys, each with three mode states, so you can configure up to 18 possible macro combinations in any game you play. You can even record new macros on the fly. It features an optimized key matrix designed to let you use more keys simultaneously in FPS games, while convenient, one-touch controls give you instant access to volume, start, stop, pause, forward and back functions.
For the mouse, a gaming-grade laser offers precision at any hand speed up to 165 inches per second. On-the-fly, adjustable dpi lets you go from pixel-precise targeting (200 dpi) to lightning-fast maneuvers (up to 5700 dpi) without pausing the action, while full-speed USB delivers the performance you need with up to 1000 reports per second. The dual-mode scroll wheel features precise click-to-click, perfect for weapon selection in games. Or switch to frictionless hyper-fast scrolling to fly through long Web pages, when you’re not playing Call of Duty: Modern Warfare 3.
The mouse also has onboard memory for up to five ready-to-play profiles, so you can configure custom button assignments and DPI values, and easily switch between them without any software running. You can even customize the weight of the device with up to 28 grams of extra mass that you can mix-and-match for optimum control.
Source: Logitech's blog