Fyi, a Gameboy Advance can fit nearly every mod available at once, including the brand new HDMI Out mod. The Ultimate GBAs on eBay usually only have an updated screen. : r/GameboyAdvance
Service HDMI TV Out for Game Boy Advance - Etsy
GBA SP HDMI-Kompatibel Adapter HDTV Konverter PCB Kit Für Gameboy Advance SP GBA SP Konsole _ - AliExpress Mobile
Gameboy Advance Sp Game Adapter | Gameboy Advance Sp Ac Adapter - Hdmi-compatible - Aliexpress