Chester Creek, VisionBoard Large Print Extra Large White Letters on Black Keyboard - VisionBoard&trade; Large Key Keyboard (Black) Computer Keyboard with Big Keys and Large High Contrast Letters Model: VB Black The VisionBoard also works on a MAC, not just PC! Operating System: IBM PC: Windows 98SE, 2000, ME, XP, Vista, Windows 7 - 10 Operating System: MAC OS 10.1.5 and higher Big 1 inch keys Connector: USB includes PS/2 adapter Safety: FCC CE Approved 1 Year Warranty.