Specifications:

• Microcontroller Atmel ATmega328
• Operating Voltage (logic level) 5 V
• Input Voltage (recommended) 7-12 V
• Input Voltage (limits) 6-20 V
• Digital I/O Pins 14 (of which 6 provide PWM output)
• Analog Input Pins 8
• DC Current per I/O Pin 40 mA
• Flash Memory 32 KB (ATmega328) of which 2 KB used by bootloader
• SRAM 2 KB (ATmega328)
• EEPROM 1 KB (ATmega328)
• Clock Speed 16 MHz
• Dimensions 0.73″ x 1.70″
• Length 45 mm
• Width 18 mm
• Weight 5 g