This includes 2 brand new cases in the box. You will need the applicable mount to twist and lock it to the device. My household uses this brand for mounting on bicycle, motorcycle, and car. The last 2 pictures are from the Quadlock website which contains additional details about this case if you have never used one. It retails for $40 for one case but you get 2 here. If you need just one case, I can split up this bundle and sell one for $22.