Upgrade: Low cost and high stability, can replace the basic program of STM32F103C6T6 chip. (If your program flash is less than 32K, RAM is less than 10K, and Timer 4 and Serial 3 are not used, you can use it instead) ST-Link V2 Programmer: Supports a full range of STM32 SWD debugging interfaces, simple 4-wire interface (including supply), fast and stable; interface definition shell directly marked 40pin STM32F103C6T6 minimum system board: USB connector allows the board to be powered and communicate via USB. Added 5V output, and the output I/O port is protected to prevent damage to ST-Link V2 due to operational errors Color: Random color, no specific color selection available Material: Plastic + Metal Package Contents: 1 x STM32F103C6T6 development board (unwelded pin header) 1 x ST-Link V2 downloader (random color, no specific color selection available) 1 x line (random color, no specific color selection available) Only the above package content, other products are not included Note: Lighting and different displays may cause the color of the item in the picture to differ slightly from the real thing. Measurement allowance is +/- 1-3cm.