Adafruit Quad 2x2 FeatherWing Kit with Headers is a prototyping add-on and more for all Feather boards. This kit is similar to the FeatherWing Proto, except there are four headers. Connect the Feather to three other Feather Wings without needing any stacking headers. The boards are all set up in a 2x2 grid. The Quad has one quad 2x2 wing PCB and four sets of Feather Female Headers. Like the Proto, the Quad has three breakouts for each pin on a Feather and a bunch of plain grid proto holes. Also, the four sets of pins are cross-connected; for GND and 3.3V, there's a full strip of connected pads. Female headers will need to be soldered onto the PCB.
Prototyping add-on for all Feather
Can be connected to three other Feather Wings without needing any stacking headers