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.This chip has twice the flash, and four times the SRAM of its earlier sibling, the nRF52832...