This is a protective case for a Amazon Fire HD 8 (2017) tablet.
The tablet snaps into the case and is protected by it.
The thin version has 0.75mm walls, the normal version ~1mm.
Use your Fire HD tablet to control your 3D printer, with GCodePrintr - The 3D Print App. Allows printing from any Android device.
Tip: Try out GCode Simulator to check your print upfront
On Thingiverse: http://www.thingiverse.com/thing:44286
Printed with some support for the connection slots only.