Specification: _x005f_x000D_ Controller: ATMEGA32U4 _x005f_x000D_ Work Record :16 Mhz _x005f_x000D_ Operating Voltage :5v _x005f_x000D_ Input Voltage (Recommended) :7-12v _x005f_x000D_ Digital I/O Port :20 _x005f_x000D_ Pwm Channel :7 _x005f_x000D_ Analog Input :12 _x005f_x000D_ 5v Digital/Analog Port Maximum Allowable Current :40 Ma _x005f_x000D_ 3.3v Digital/Analog Port Maximum Allowable Current :50 Ma _x005f_x000D_ Flash: 32 Kb (Atmega32u4), Of Which 4 Kb Is For The Boot Loader _x005f_x000D_ Sram: 2.5kb (Atmega32u4) _x005f_x000D_ Eeprom: 1 Kb (Atmega32u4) _x005f_x000D_ Clock Speed: 16 Mhz _x005f_x000D_ Dimensions: 69 X 54 X 14 MM/2.71 X 2.12 X 0.55 In _x005f_x000D_ Type: Module _x005f_x000D_ Condition: New _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due To The Different Monitor And Light Effect, The Actual Color Of The Item Might Be Slightly Different From The Color Showed On The Pictures. Thank You! _x005f_x000D_ Please Allow 1-2 CM Measuring Deviation Due To Manual Measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 X Leonardo R3 Development Board 1. Built-in USB Interface: The Leonardo R3 development board features a built-in USB interface, making it perfect for creating custom input devices or projects that simulate user behavior. 2. For Arduino Compatible: The Leonardo R3 mini development board module is compatible for Arduino development environment, allowing you to program and develop using for Arduino programming language and tools. 3. Abundant Expansion Interfaces: The leonardo R3 microcontroller provides a variety of digital and analog input/output pins, as well as I2C and SPI interfaces, making it easy to connect and control external devices and sensors. 4. USB Powered and Debugged: The Leonardo R3 development module can be powered via the USB interface, eliminating the need for additional power circuits. 5. Suitable for Small-scale Embedded Applications: With the ATmega32U4 microcontroller, the Leonardo R3 development module is ideal for small-scale embedded applications for Arduino projects.