1.KEMOVE 64/66 key is a 60% compact mechanical keyboard with a patented 64-to-66-key layout (with arrow keys).  2.it consists of a shorter spacebar and two magic keys.,comfortable &productive with the thumb keys. 3.It have unlimited RGB backlights modes 4.This is a game changer for programmers, designers and gamers who are heavy users of certain keys, for instance, Fn, Ctrl, Alt and Shift. 5.It support some system,like OS/Win/iOS/Android