Arduino Micro R3

Manufacturer: China Support TWI and SPI communication Input voltage (recommended) range from 7V to 12V Input Voltage (limit) range from 6V to 20V 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs) Onboard ATmega32u4 microcontroller with 32KB flash memory, 2.5KB SRAM and 1KB EEPROM