Well? What is it.

If I told you it had to be positioned on a horizontal surface with the lower hinge pin aligned exactly east-west would it help?
Or the angled arm needs to be at 51 degrees to the horizontal? Now do you know?
Well it is a digital sundial, it tells the time by projecting a shadow with the time displayed digitally within the shadow. Not my work I hasten to add but a techy neighbour who owns a 3D printer. The jam jar of gravel is just ballast!