Adafruit Feather 32u4 Bluefruit LE with Headers, Assembled rob0112 The polarity of the adapter

The polarity of the adapter is indicated by the plus or minus symbol on the right

It has a silicon coating and is very effective

and the official resource links below show wiring and setup details

and so we aren't at the mercy of any third party vendors who may or may not be interested in keeping their code up to date or catering to our customer's needs

Adafruit Feather 32u4 Bluefruit LE with Headers, Assembled rob0112 The polarity of the adapterFeather is the new development board from Adafruit, and like its namesake it is thin, light, and lets you fly! We designed Feather to be a new standard for portable microcontroller cores. This is the Adafruit Feather 32u4 Bluefruit with Headers our take on an 'all in one' Arduino compatible + Bluetooth Low Energy with built in USB and battery charging. Its an Adafruit Feather 32u4 with a BTLE module, ready to rock! We have other boards in the Feather