Features: Equipped with the upgraded ATmega328P microcontroller (5V/16MHz), this board deliver for embedded development while maintaining size. Its miniature design features 14 digital GPIO pin and I2C/UART interfaces for sensory/actuator integration in space constrained projects. Ideal for maker, educators, and developer low power solution for battery operated prototypes like wearable devices or environmental monitoring systems. Optimized for breadboard prototyping and embedded applications requiring extended battery, including sensory, robotics controllers, and remote data logging units. You can write codes without complicated configuration, support rich library resources (such as sensory driver and communication protocols), and lower the development threshold, which is extremely convenient for prototyping. Specifications: Component:ABS Size:Approx. 33x18x2mm/1.3x0.7x0.07inch Package Includes: 2 Optional Package: Package 1 Include:1Pc ATMEGA328P Module Package 2 Include:3Pcs ATMEGA328P Module 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.