1. Support the PXT graphical programming interface developed by 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 :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, 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 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 switch 5 gold , seamless connection with microbit 0, 1, 2, 3V, GND pins to microbit gold 5V and 3.3V interface, support 3-5V sensor module (onboard 5V and 3.3V 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 :bit Development board (Random color, 't accept the specified color) 1 * IO BIT V2. 0 Expansion Board Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.