Leonardo R3 Atmega32u4 Development Board

Microcontroller: ATmega32u4
Operating voltage: 5V
Input voltage(recommended): 7V - 12V
Input voltage(limits): 6V - 20V
Digital I / O pins: 20
PWM channels: 7
Analog input channels: 12
DC current per I / O pin: 40mA
DC current for 3.3V pin: 50mA
Flash memory: 32KB(ATmega32u4) of which 4KB used by bootloader
SRAM: 2.5KB(ATmega32u4)
EEPROM: 1KB(ATmega32u4)
Clock speed: 16MHz