This is a Math & Automatic expansion board formicro:bit
. Easy to use, and suitable for a wide range of applications. We designed this board for two sorts of application scenarios: math game and automation control. The 16 programmable touch keys and RGB LEDs on the board offers rich function and flexible input and output. Besides, the board has 1 vibration motor, 1 buzzer, 2 motor ports, 2 servo ports and 9 expansion ports, which lays a foundation for using in automation controlling application.