Features: Advanced Control Unit: Equipped with a consistent microcontroller, fully consistent common development board specifications, providing an open platform ideal for electronics enthusiasts and students to explore programming and create projects. Versatile Connectivity: Features 12 digital ports including 6 modulation channels, 8 analog inputs, and 1 communication connection, enabling direct programming for seamless integration with various external components in multiple applications. Flexible Power preferences: Operates via USB for both programming and power supply, accepts 3.3V 12V external power sources such as rechargeable cells, delivering adaptable energy choices for diverse project needs. Compact Design: Measures just 43.3×18mm with lightweight construction, featuring minimal space requirements for effortless installation in small projects, includes automatic driver recognition for current operating systems. Multiple Connection Types: Provides standard, reduced size, and contemporary USB connection variants to accommodate different host devices, comes with detailed pin documentation and educational materials for all skill levels. Specifications: Materials: ABS Size: 43.2x17.6mm Weight: 8g Working voltages: 5V Clock frequency: 16MHz Package Includes: 2Pcs Development Board note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item.