USB Wired Gaming Emitting Backlit Keyboard and Mouse Set Sleek full-size wireless keyboard with softly rounded keys for hour after hour of typing comfort Contoured invisible optical mouse that tracks on just about any surface, with rubber grips and smooth, accurate cursor control (The optical sensor does not work on glass or mirrors) Powerful 2.4 GHz wireless and one tiny Logitech Unifying receiver give you a reliable connection without delays or dropouts Works with Windows-based PCs Full-Sized Keyboard With High-End, Scissor-Style Keycaps For A More Responsive Keystroke