1. Support the PXT graphical programming interface developed by 2. Support WINDOWS, MACOS, IOS, and other operating systems3. The programming environment is based on WEB services, no need to download additional compilers4. Program the computer through USB programming and emulation5. The mobile terminal wirelessly writes and emulates the program through Bluetooth:bit V1.5 version parametersMemory: 256kb Flash 16kb RAMExternal chip: NXP KL26Z 16KB RAMWorking current: 90MAConnection: The interface adopts a flat designI2C: bus sharing (multiplexing) I2C busWireless: 2.4GHZ radio/Bluetooth 4.0Supports a variety of mainstream programming languages including JAVASRIPT, PHYTHON, MBED CApplicable population: primary school, junior middle school and senior high schoolOperating system: windows, MacOS, IOS, , etcProgramming software: javasript, python, mbed C, etcIOBIT V2.0 expansion board parameters supply mode: USB 5V 1AOnboard 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 switch5 gold , seamless connection with microbit 0, 1, 2, 3V, GND pins to protect microbit gold Provide 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, 20Analog feet: 0, 1, 2Material:PCBcolour:blackPackage Contents:1 * BBC :bit Development board (Random color, don't accept the specified color)1 * IO BIT V2. 0 Expansion BoardOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.