The whole console sits in a 9.5mm antenna plug: two stacked boards joined by a flex cable, an ESP32-S3 and a small battery. It synthesizes a PAL TV signal in software, sound included, and takes input from an Xbox controller over Bluetooth. The KiCad files and firmware are on GitHub under GPL-2.0, so it can be rebuilt. It needs a TV with an analog antenna input and a flex-board soldering tolerance.