This is a magnetic phone stand that won't obstruct any inputs or outputs of your device such a power cable, an audio jack or the loudspeakers. It is designed to feet 9 disc magnets Ø 8 mm, height 4 mm. I got mines at supermagnete.
Parts need to be super glued together. You may want to add rubber adhesion pieces at the bottom of the holder.To magnetize my phone, I cut off a piece of metal from a tin can that I then put in-between my phone and it's cover.