This is a spare cartridge for the RetroFlag GPi Case (Gameboy Inspired). Note: The GPi case already includes a single cartridge for housing your Raspberry Pi Zero, however if you want to swap-out different Raspberry Pis or just need a spare - this item is for you https://elecena.pl/product/22718049/spare-retroflag-gpi-case-cartridge-discontinued 2023-03-07 https://elecena.pl/product/22718049/spare-retroflag-gpi-case-cartridge-discontinued 2024-09-19