The LogicKeyboard XL Print - American English - Apple Advance Keyboard is a wired USB Apple Ultrathin Anodized Aluminum keyboard featuring large black letters, numbers and punctuations over yellow keys. While this makes the keyboard ideal for visually impaired individuals, it also makes it easier to type accurately under any lighting conditions. Since this allows for less squinting to see each key, it can help to lessen strain on your eyes. Additionally, two built-in USB ports on the keyboard allow for desktop expansion.