If you look closely at the picture of it in action, there is a clear acrylic shell covering the PCB on the back. They're actually gripping the acrylic shell. In the picture of the individual components, it appears to be the laser-cut wood pieces. That picture includes a pair of pieces that look like they go on the front (there's a cutout for the D-pad/face buttons), but I don't see them installed on the action shots. I think that the shell may be intended to cover both back and front, and they just didn't install it for the action pictures.