HiVis Monster keyboard, Yellow Keys, Black Upper Case LettersHiVis Monster keyboard, Yellow Keys, Black Upper Case Letters The Monster Keyboard HiVis Upper Case Letters Keyboard opens up new opportunities for those with impaired eye sight. It is widely recognised that people with impaired vision respond more positively to black fonts on yellow keys. Therefore have a distinct advantage in having Keyboards with LARGE keys. The cost has often been the downside of these keyboards, which can be an issue for their