The Beam N Read Extra Bold, Large Print Keyboard Stickers, model KBV 109, are keytop overlays designed for use by individuals with low vision. They feature large, extra bold san serif fonts. The stickers have four specially selected high- contrast color combinations, each on a separate sheet. With 109 stickers on each sheet, the set includes stickers for both personal computers (PC) and Macintosh and work with desktop, notebook, laptop, and netbook keyboards. They can also be used to extend the life of worn out keyboards in schools, libraries, and other places with high use keyboards where the original letters are wearing off. COLOR: Each set includes bold white letters on a black background, bold yellow letters on a black background, bold black letters on white background, and bold black letters on a yellow background. WARRANTY/GUARANTEE: 120-day warranty from purchase date on manufacturing defects, limited to replacement or repair of the original product.