Datasheet
This is the FeatherWing Quad Side-by-Side - a prototyping add-on and
more for all Feather boards. This is similar to the FeatherWing
Proto except there are four! The magic of the Quad comes when you
want to connect your Feather to three other Feather Wings without
needing any stacking headers! The Quad comes with:
1 Quad Side-by-side Wing PCB
4 sets Feather Female Headers