Wired Visikey Keyboard Large Print Pc and Macintosh High white on black Contrast lettering for easier to distinguish at a glance Enhanced Visibility Lettering System rated 20/300 while Standard keyboards are rated 20/70 Letters are 430% larger than the letters on a standard keyboard Function keys, punctuation keys and media buttons Keyboard is 104 key model with 15 hot keys enable one touch access to multimedia & internet functions