The board can be used to join cables with 4-pin SH JST (and compatible) plugs, commonly used by STEMMA QT / Qwiic ports on microcontrollers and add-on boards. These are handy for extending a Qwiic cable if you don\’t have one long enough for your project, or to protect a port if you\’re regularly swapping out sensors/dev boards. The pin connections are 1-1, matching both sides. The pack includes four boards. Features JST-SH cable joiners 4-pin JST-SH Compatible with STEMMA QT, Qwiic and other 4-pin JST-SH connection systems Allows you to extend a JST-SH cable Pack of 4 Blue PCBs Package Contents 4x 4-Pin JST-SH Cable Joiners (4-pack)