Description: With 22 digital input/output port, 7 x PWM port, 12 x Analog input port; The Leonardo uses single chip solutions; Just uses one Atmega32u4 to realize USB communication and control. Atmega32u4 supports USB, can make Leonardo simulate mouse and keyboard; Leonardo compatible for Arduino IDE1.01 and above version. Controller: ATmega32u4 Specification: Goods recorded: 16 MHz Operating voltage: 5V Input Voltage (recommended) :7-12V Digital IO port: 22 ; D0-D13, D14-MISO D15-SCK, D16-MOSI D18-23 (A0-A5) PWM channel: 7 (D3, D5, D6, D9, D10, D11, D13) Analog input: 12 (A0-A5, D4-A6, D6-A7, D8-A8 ,-A9 D9, D10-A10, D12-A11) 5V digital / analog port maximum permissible current: 40 mA 3.3V digital / analog port maximum permissible current: 50 mA Flash Memory: 32 KB (ATmega32u4) of which 4 KB used by the bootloader SRAM: 2.5 KB (ATmega32u4) EEPROM: 1 KB (ATmega32u4) Size: Approx. 7.1x 5.4x 1.2cm/ 2.80x 2.13x 0.47inch Package Includes: 1 Piece R3 development board 1 Piece USB cable Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement