It has a powerful ability to drive DC motors, stepper motors, servos, onboard buzzers, and RGB pixels and release all valid IO from micro bit, with support for the most common electronics module in the market.
It comes with a 18650 battery holder, integrated lithium battery boost, charging, and protection chip. Support for external power input. Mechanically support for KittenBot robotic chassis and LEGO technical slots.
The powerful drive capability and built-in battery make DIY more convenient and free. We have received unanimous praise from the school teacher training institutions and individual enthusiasts. It is an excellent choice for your robotic projects based on Micro: bit!

Hardware Overview

1. 5V external power input（with anti-reverse protection）
2. Power switch
3. Power Indicator
4. Battery Indicator
5. Micro USB charging port
6. 4-channel DC motor / 2-channel stepper motor
7. Jumper for buzzer selection
8. 8 channel IO（corresponding to Micro:bit P0-P2、P8、P12-P15）
9. 5V and GND port
10. Buzzer
11. 8-channel servo port
12. I2C interface (expandable I2C module)
13. 18650 battery case
14. Battery protection recovery push button
15. Micro: bit edge connector
16. 4x RGB pixel

17. Servo driver (PCA9685)
18. 2xDc/Stepper driver (DRV8833)
19. KittenBot robot chassis mounting hole
20. Standard LEGO hole