Features: Equipped with STM32F411CEU6 processor, the main frequency can reach 100MHz, providing up to 90 DMIPS of computing power and supporting complex computing tasks. It is especially suitable for engineers and developers to meet the needs of real time control and signal processing and promote the smooth progress of the project. Equipped with up to 50pin, including UART, SPI, I2C and other communication interfaces, it has extremely high expansibility. The problem of inconvenient peripheral connection is solved, and users can easily integrate sensors and modules to realize multi-functional applications. It is very suitable for Internet of Things development and home system, and helps users to create embedded devices Specifications: Size:Approx.54x22mm/2.13x0.87inch Operating frequency: 100MHz Working: 1.7V~3.6V Working temperature: -40℃~+85℃ Package Includes: 1Pc STM32F411CEU6 Development Board note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.