The Micro Bit (also referred to as BBC Micro Bit, stylized as micro:bit) is an open source hardware ARM-based embedded system designed by the BBC for use in computer education in the United Kingdom. ... The device inputs and outputs are through five ring connectors that form part of a larger 25-pin edge connector. Each Go Pack comes with the Micro:bit microcontroller board, battery pack, 2 AAA batteries, USB cord.