Leonardo R3 compatible for Arduino Controller with Micro USB

Leonardo is a microcontroller board based on the ATmega32u4. It is easy-to-use open-source hardware.
It has 20 digital input/output pins (of which 7 can be used as PWM outputs), 12 analog inputs, a 16 MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button.
It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started. Note that ICSP (In-Circuit Serial Programming) header can not only program the firmware to Atmega32u4 but also be used as an SPI communication interface.
The Leonardo can be powered via the micro USB connection, via an external power supply jack (DC 7-12V) or even with female headers Vin /GND (DC 7-12V).
The Leonardo differs from other Arduino boards using a separate USB-Serial chip in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows Leonardo to appear on a connected computer with a mouse and keyboard.

Microcontroller : Atmega32u4

Operating Voltage : 5V

Input Voltage (recommended) : DC7-12V

Digital I/O Pins : 20 (of which 7 provide PWM output)

PWM Digital I/O Pins : 7

Analog Input Pins : 12

DC Current per I/O Pin : 40 mA

DC Current for 3.3V Pin : 50 mA

Flash Memory : 32 KB (Atmega32u4) of which 4 KB used by bootloader

SRAM : 2.5 KB (ATmega32u4)

EEPROM : 1 KB (Atmega32u4)

Clock Speed : 16 MHz

LED_BUILTIN : D13