Adafruit Feather M0 RFM69HCW Packet Radio - 433MHz (RadioFruit)This is the Adafruit Feather M0 RFM69 Packet Radio (433 MHz). We call these RadioFruits, our take on an microcontroller with a RFM69 HCW packet radio transceiver plus built in USB and battery charging. It's an Adafruit Feather M0 with a 433MHz radio module cooked in! Feather 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.