This is the "GBA/GBC Dumper V2," a device that allows you to extract ROMs from Game Boy Advance (GBA) and Game Boy Color (GBC) cartridges. It connects via a USB port for easy use and is a convenient item for backing up, analyzing, and saving retro games. 【Product Specifications】 ・Model Name: GBA/GBC Dumper V2 ・Connection Method: USB port ・Usage: Used only a few times (stored away) A separate USB B-type cable is required.