The Adafruit Feather nRF52840 Express is the new Feather family member with Bluetooth® Low Energy and native USB support featuring the nRF52840! It's our take on an 'all-in-one' Arduino-compatible + Bluetooth® Low Energy with built-in USB plus battery charging. With native USB it's even ready to join the CircuitPython party. We have other boards in the Feather family, check'em out here.