It is a stand for DSO Oscilloscope. I wanted it at an angle and have space for 2 18650 Batteries attached by Velcro strips for easy removal. I also have a second version where the back is removed.
Printed with 30% infill and no support needed!
Add some rubber feet like I did, so the stand doesn't slip on your table.

Thanks to my friend HOWARD for helping me with this!