This is a case for a tiny SainSmart 1.3" OLED screen (http://www.amazon.co.uk/SainSmart-Serial-128X64-Module-Arduino/dp/B00MQL08R6). To use this you'll need the display, and arduino, a computer to run the control software on and a running OctoPrint server controlling your printer. The screen is connected to an Arduino, running this software: https://github.com/kirberich/octoprint-monitor. The software connects to an OctoPrint server to fetch information about the printer and the current print job. The arduino needs to be connected to a computer that takes care of the communication with OctoPrint. The display shows the general printer status, progress of an ongoing job and a minimal status during the night, including a warning if the printer is still hot.