This is a low-cost expansion board for Micro:bit, which is specifically used for easy access of the IO ports on the Micro:bit. It breaks out all the IO contacts on the Micro:bit and comes with a built-in buzzer. The buzzer is connected to the P0 pin through the slide switch. The small size is very suitable for small projects using Micro:bit.

Feature :

1. 3.5mm audio interface
2. 2. 5 metal interfaces seamlessly connected to micro:bit 0, 1, 2, 3V, GND pins to protect
3. Micro:bit metal interface3.
4. USB 5V 1A power supply for maximum driving force  (5V 1A self-recovery fuse)4. 3.3V and 5V power interface
5. Support 3V-5V sensor module
6. Micro:bit all pins lead
7. Bring your own buzzer (switching switch – used to switch buzzer music output and audio port sound output)
8. With compatible forLEGO pin holes
9. Yellow and black differentiated 3pin interface