Feature: 1. Easy Plug in: AM 001 expansion board adopts a user friendly direct plug in design, compatible for micro:bit series modules, no additional tools required, plug and play for easy use. 2. Strong Function: Reserved I2C and AIN control interfaces as well as IO port SPI pinout, can connect various hardware devices to expand the watch's function, and support SPI, I2C modes. 3. High Stability: Stable DC3.3V power supply voltage, providing power switching and safety circuit, eliminating worries about power fluctuations damaging the device. 4. Excellent PCB: The expansion board is made of PCB material, firm and sturdy, with strong load bearing capacity and good heat dissipation, ensuring long term performance. 5. Convenient Use: Expansion board with multiple 3.3V, GND interfaces greatly facilitate power expansion needs, allowing the device to run smoothly even in complex environments. Specification: Item Type: Expansion Board for Micro Bit Material: PCB Power Supply Voltage: DC3.3V Application: for micro:bit Series Modules Style: Built in for Micro:bit interface for direct insertion Onboard IO port SPI interface pinout for easy expansion Reserved IIC control interface for connecting to other main control boards Reserved AIN control interface for convenient expansion Multiple 3.3V, GND interfaces onboard for easy power expansion. Package List: 1 x Expansion Board 1 x User Manual