[Upgrade] Low cost and high stability, it can replace the basic of STM32F103C6T6 chip. (If your flash is less than 32K, RAM is less than 10K, and Timer 4 and Serial 3 are not used, you can use it ) ST-Link V2 Programmer: supports a full range of STM32 SWD debugging interfaces, simple 4-wire interface (including power supply), fast and stable; interface definition shell directly marked 40pin STM32F103C6T6 minimum system board: -USB connector, which can power the board and communicate with USB. Added 5V power output, and the output I/O port is , for fear of operation errors caused by damage to ST-LINK V2 Colour:Random Color, ' accept the specified color Material:Plastic + Metal Package Contents: 1 x STM32F103C6T6 development board (unwelded pin header) 1 x ST-Link V2 downloader (random color, ' accept the specified color) 1 x (random color, ' accept the specified color) Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.