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Equipped with a Atmel AVR ATmega32U4 micro controller with integrated USB controller. 100 % compatible with Arduino Leonardo and compatible with most Arduino UNO shields. 20 digital inputs and outputs (I/O pins), included 7 PWM outputs, 12 analogue inputs, 16 MHz clock rate. 32 KB Flash memory, of which 4 KB occupied by boot loader, 2.5 KB SRAM, 1 KB EEPROM, with ICSP, micro USB interface and DC books.