The XL Print LogicSkin Keyboard Cover is a large print keytop overlay designed to make Apple Macintosh desktop computer keyboards accessible to individuals with low vision. Made from high-grade silicone, this washable cover stays in place and protects the keyboard from spills or dirt. The alphanumeric characters are printed in large type and include numbers, punctuation and other functional keys, such Tab and ESC. Letters are presented in upper case only. COMPATIBILITY: Compatible with Apple Macintosh Ultra Thin Alu Keyboards. DIMENSIONS (LxWxH): 16.9 x 4.4 x 0.08 inches. WEIGHT: 1.23 ounces. COLOR: Available in a choice of white letters on a black background or black letters on a white background. WARRANTY: One year warranty.