High performance Alps Mechanical Keyswitches provide the ability to type faster, and more accurately and comfortably. Mac option symbols are laser etched on to the keys so they'll never wear off and you'll always know which key is which. Ghosting happens when you type so fast that your keyboard can't keep up with you, which results in letters missing from what you actually typed. The Tactile Pro has anti-ghosting circuitry that eliminates this problem. You can type as fast as you want and the Tactile Pro will keep up with you. Forget about digging through the wires behind your computer just to sync your iPod. Quickly attach your USB devices to any of the 3 USB 2.0 ports directly on the keyboard. It makes connecting your MP3 players, external hard drives, joysticks, and more as easy as pie.