With Chester Creek TVB-BLACK VisionBoard, you can outsmart arthritis and start seeing all you've been missing. The VisionBoard is created for anyone who struggles with vision or dexterity issues. Its design reduces eyestrain and improves finger contact and keyboarding control. The VisionBoard has big 1" oversized keys for better control and contact, large, bold letters and numbers to improve readability and high-contrast white-on-black lettering, proven to be easier on the eyes. The VisionBoard also works on a MAC.