This is a bare cartridge PCB for Alex J. Lowry's Z80 TV Game in youthful yellow. The Z80 TV Game is a monochrome game console that uses the Z80 microprocessor. Lowry designed the PCBs off of the original schematics by Mr. This is a bare PCB, so you will have source the components yourself. Visit Lowry's GitHub for more information on the board and additional documentation ( complains if a link directly, should be able to find it by Googling). I also have some additional cartridge PCBs available in other colors as well as the console PCB.
Let me know if you have any additional questions or need more photos.