This is a Surface Pro Tablet holder for the Proform R10 Rower. The assembly attaches to the square bar behind the primary display and allows you to add a tablet above the built in display.
Secured with M5 hardware for the VESA mount, and gopro style connections.
The tablet holder can be printed in a single piece on the MK3S, or as a left and right half depending on your printer size. I printed all parts in PLA.
The author hasn't provided the model origin yet.