The Fractal Design Define R4 is the latest in the Define Series of computer cases offering minimalistic & stunning Scandinavian design fused with maximum sound reduction, configurability & functionality. Now featuring the option to have your Define R4 case with a large fully transparent window allowing you to display your setup in style. The acrylic window side panel features the same clean, Scandinavian design as the case itself, & has a completely flat outer surface without any plastic bezel or rivets.