Nordic nRF52840 Solution DongleOpen Bootloader pre-loaded for easy firmware developmentUSB Type C InterfaceCompact size with 26.2 x 15.1 x 6.8 mm ( 1.03 x 0.59 x 0.26 in)Deployed Raytac MDBT50Q-P1M Module32-bit ARM Cortex M4F CPU with 1MB Flash Memory / 256kB RAMBluetooth BT 5.4 FCC/IC/CE/Telec/KC/SRRC/NCC/RCM Pre-certifiedA recommended 3rd-party module by Nordic Semiconductor