Asiawill&reg; Compatible Version Funduino Leonardo R3 with USB Cable Microcontroller ATmega32u4 Can Simulate Keyboard Mouse Funduino Leonardo R3 Microcontroller ATmega32u4 Can Simulate Keyboard Mouse The Arduino Leonardo is a microcontroller board based on the ATmega32u4 The Leonardo differs from all preceding boards in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Leonardo to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port