Original 1982 Videx soft switcher used to automatically switch between 40 and 80 column modes when using a Videx 80 column video card in an Apple II.
Notice on the bottom of the board, the pin extender is missing most of the pins that plug into the Apple II's F-14 socket. You will need to de-solder the extender and replace with new pin headers.
Due to age, the board is sold untested, as-is, with no warranties of any kind.
Please let me know if you have any questions.