This is the FeatherWing Tripler - a prototyping add-on and more for all Feather boards. This is similar to the FeatherWing Proto except there are three! The magic of the Tripler comes when you want to connect your Feather to two other Feather Wings without needing any stacking headers! The Tripler comes with: 1 Tripler Wing PCB 3 sets Feather Female Headers The Tripler, like the Proto, has three breakouts for each pin on a Feather, as well as a bunch of plain grid proto holes. Also, the three sets of pins are cross connected and for GND and 3.3V, we give you a full strip of connected pads. You'll need to solder on the female headers to the PCB, the Tripler comes as a mini kit!