Features: USB Ready Workflow: Use the integrated USB interface to link the board with your computer for programming and debugging, helping you start firmware practice with less setup friction in class or at a desk. Socketed Expansion Layout: The 14/20 pin DIP socket and header rows give you a practical base for plug in MCU work, wire routing and add on module exploration during prototyping. Board Side I O Resources: Onboard buttons and LED indicators provide built in input and visible response, making it easier to run first passes without assembling a full external circuit. Spec Guided Capability View: Listed memory resources, a 16MHz CPU clock, 8 channel analog input support and UART I2C SPI communication help you plan study tasks with clearer expectations. Compact Workspace Friendly Size: The approx. 8cm/3.14inch x 6cm/2.36inch board footprint fits small desks, training tables and electronics stations while keeping placement simple before daily use. Specifications: Size: Approx.8x6cm/3.14x2.36inch Quantity: 1 Set Package Includes: 1 set Development Board note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item.