1、Open the original design of the circuit diagram, the development software interface is easy to download. 2、You can also modify it according to your needs, the download procedure is simple and convenient. 3、You can simply use sensors, a variety of electronic components (such as: LED lights, buzzers, buttons, photoresistors, etc.) to make a variety of interesting works. 4、Using the high‑speed microprocessor controller. 5、The development interface and environment are very simple and easy to understand, which is very suitable for beginners to learn. 6、Support for ISP download function. Item Type: Development Board Digital I/O: Digital input/output terminals total 0~13 Analog I/O: The analog input/output terminals are 0~5 Download Function: Support for ISP download function. Input Voltage: No external power supply is required when connecting to the computer USB, external power supply 7V~12V DC voltage input Output Voltage: 5V DC voltage output and 3.3V DC voltage output Controller: For microprocessor controller 1 x Development Board