Features:
 ARM Cortex M4F (with HW floating point acceleration) running at 64MHz
 1MB flash and 256KB SRAM
 Native Open Source USB stack - pre-programmed with UF2 bootloader
 Bluetooth Low Energy compatible 2.4GHz radio (Details available in
the nRF52840product specification)
 FCC / IC / TELEC certified module
 Up to +8dBm output power
 1.7v to 3.3v operation with internal linear and DC/DC voltage regulators
 21 GPIO, 6 x 12-bit ADC pins, up to 12 PWM outputs (3 PWM modules
with 4 outputs each)
 Pin #3 red LED for general purpose blinking, NeoPixel for colorful
feedback
 Power/enable pin
 Measures 2.0" x 0.9" x 0.28" (51mm x 23mm x 7.2mm) without headers
soldered in
 Light as a (large?) feather - 6 grams
 4 mounting holes
 Reset button
 SWD connector for debugging
 Works out of the box with all of our Adafruit FeatherWings! (Even the
UART-using ones like the GPS FeatherWing)