MicrocontrollerATmega32u4Operating Voltage5VInput Voltage (Recommended)7-12VInput Voltage (Limits)6-20VDigital I/O Pins20PWM Channels7Analog Input Channels12DC Current Per I/O Pin40 mADC Current for 3.3V Pin50 mAFlash Memory32 KB (ATmega32u4)SRAM2.5 KB (ATmega32u4)EEPROM1 KB (ATmega32u4)Clock Speed16 MHzLength68.6 mmWidth53.3 mmWeight20 g The Arduino Leonardo is a microcontroller board based on the ATmega32u4 that includes 20 digital input/output pins where 7 can be used as PWM outputs and 12 as analog inputs , a 16 MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button. We can simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to operate . The Leonardo has built-in USB communication that eliminating the need for a secondary processor. This allows the Leonardo to appear to a connected computer as a mouse and keyboard. The drivers are automatically installed plugging with an USB cable to the PC. The software can be found in the official site . Brand No Brand SKU 101048035_NP-1021566939 Cable Type Not Specified Auto Shut Off Not Specified Output Voltage Not Specified