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 Overwritable, programmable read memory): 1 KB

Connections and interfaces:

• WLAN: No
• Built-in Ethernet port: No
• Number of USB ports: 1
• Number of digital I/O contacts: 20
• Number of analog I/O contacts: 12
• PWM digital I/O pins: 7

Functions:

• Form factor: Arduino
• DC input voltage: 7-12 V
• Working voltage: 5 V
• Input voltage (max.): 6 - 20 V
• DC current per I/O pin: 40 mA

Weight & dimensions:

• Dimensions panel: 53.3 x 68.6 mm.