MyBoard-LC is a large key, large print keyboard designed for use by children with motor skill or cognitive disabilities. This keyboard has oversized keys color-coded by character set. Keytop labels have lowercase letters to assist those who have not yet mastered the relationship between uppercase and lowercase letters. COMPATIBILITY: For use on IBM and compatible personal computers or Macintosh computers. SYSTEM REQUIREMENTS: Windows 98SE, 2000, ME, XP, or Vista or MAC OS 10.1.5 or higher and a USB port. DIMENSIONS: 19 x 1.5 x 7 inches. Keys are 1-inch square. COLOR: Black case with red, yellow, blue, and green keys. The keytop labels are white. WARRANTY: Limited lifetime warranty.