This is a mount for an Amazon Fire 7 Tablet ($50 on amazon). I've found it much easier to use the OctoRemote app for controlling the printer rather than navigating through the LCD Menu (especially comes in handy when adjusting the z-axis). Plus all of the files on the octoprint server are accessible right from the tablet, ready to print.
The mount clamps onto the spool holder that comes with the Prusa MK3s. It is clamped on with 2 M3 Screws & Nuts (you probably have some left over from you prusa build in the spare parts bag).
To Install:
To get the tablet ready (I did this before mounting the tablet) -
Install the google play store on your tablet (I used this tutorial):
https://teleread.org/2017/10/14/how-to-add-google-play-to-the-fire-7-fire-hd-8-and-new-fire-hd-10/
Once the play store is installed, search for and install octoremote:
https://play.google.com/store/apps/details?id=com.kabacon.octoremote&hl=en_US&gl=US
After the app is installed, fill in your OctoPrint Server address & API key, and you have control of your printer!!
The author marked this model as their own original creation.