This is the Super Game Boy Plus, or SGB+. It is a circuit board that allows you to enhance an original Super Game Boy, or create standalone single-cartridge Game Boy games for play on the Super Nintendo. This circuit board can do the following:

1. Allows for three separate clock options:
2. the original "wrong" clock speed,
3. the correct clock speed, or
4. the correct clock speed with the ability to overclock and underclock in-game
5. Incorporates the link port onto the board using a small daughter board to offset it into a perfect location on the edge of a standard SNES cartridge (if you are using an SGB2 shell, it will fit without the daughter board)
6. Optionally allow you to lock the board to one specific Game Boy game instead of using the cartridge connector - save data can be transplanted to/from the cartridge via the FRAM chip
7. Can be used in three different SNES shells with minimal shell trimming required:
8. an original Super Game Boy shell with the cartridge connector,
9. a standard 46-pin SNES shell (will require two cuts on the bottom of the shell for the extra cart edge pins), and
10. a 60-pin SNES shell used for games that used enhancement chips like the SA-1 or SuperFX

Please view all the information on the GitHub.

Thickness must be 1.2mm.

Edge must be beveled by 30 degrees or more.

Surface finish must be ENIG or Hard Gold.