Main Features Processor Microcontroller Model ATMega32u4 Microcontroller Frequency 16 MHz Memory Flash Memory 0.032 MB SRAM (Static Random Access Memory) 2.5 KB EEPROM (Electrically Overwriteable, programmable read memory) 1 KB connectors and interfaces WLAN Non-built Ethernet port Not number of digital I/O contacts 20 Number of analog I/O contacts 12 PWM digital I/A pins 7 functions form factor Arduino DC input voltage 5 V working voltage 5 V DC voltage per I/A pin 40 mA Weight & Dimensions Dimensions Table 23 x 71.1 mm Weight 16 g