The question is somewhat incomprehensible. It is neither VR nor a case. But the product pictures can easily be misunderstood, as it also shows the VR glasses and the carrying case. But it is only the alternative (and better) head mount, as already explained by 'haerast'. See picture: https://www.digitec.ch/im...

this is an alternative head mount for the vr glasses. in my opinion, it is more comfortable to wear than the original strap, as it holds the vr glasses more firmly on the head and, thanks to the additional batteries on the back, moves the centre of gravity of the entire vr glasses much closer to the middle of the head.

the main advantage, however, is that the wireless playtime is almost doubled.