Keys-U-See Wireless Large Print Keyboard and Wireless Mouse Bundle Set (Keys U See) Wireless keyboard and optical mouse Internet, multimedia and energy-saver hot keys; Yellow keys with bold 41-point typeface Requires 4 AA batteries (not included);Requires Windows-compatible computer and USB keyboard connection. The mouse does not have an on/off button because it has a sleep function Recommended for the visually impaired; Easy to see print, even in low light