1. Support the PXT graphical programming interface developed by Microsoft 2. Support WINDOWS, MACOS, IOS, Android and other operating systems 3. The programming environment is based on WEB services, no need to download additional compilers 4. Program the computer through USB programming and emulation 5. The mobile terminal wirelessly writes and emulates the program through Bluetooth Micro:bit V1.5 version parameters Memory: 256kb Flash 16kb RAM External chip: NXP KL26Z 16KB RAM Working current: 90MA Connection: The interface adopts a flat design I2C: bus sharing (multiplexing) I2C bus Wireless: 2.4GHZ radio/Bluetooth 4.0 Supports a variety of mainstream programming languages including JAVASRIPT, PHYTHON, MBED C Applicable population: primary school, junior middle school and senior high school Operating system: windows, MacOS, IOS, Android, etc Programming software: javasript, python, mbed C, etc IOBIT V2.0 expansion board parameters Power supply mode: USB 5V 1A Onboard Features: 5V 1A resettable fuse; Buzzer (P0 interface); 3.5mm audio port (P0 interface); Toggle switch (for switching the buzzer music output and audio port sound output); USB power switch 5 gold fingers, seamless connection with microbit 0, 1, 2, 3V, GND pins to protect microbit gold fingers Provide 5V and 3.3V power interface, support 3-5V sensor module (onboard 5V and 3.3V power indicator) Pins include: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 19, 20 Analog feet: 0, 1, 2 Material:PCB colour:black Package Contents: 1 * BBC Micro:bit Development board (Random color, don't accept the specified color) 1 * IO BIT V2. 0 Expansion Board