Microcontroller: Atmel ATmega328
Operating Voltage (logic level): 5 V
Input Voltage (recommended): 5 V
Input Voltage (limits): 5 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 of which 2 KB used by bootloader
SRAM: 2 KB
EEPROM: 1 KB
Clock Speed: 16 MHz
Dimensions: 0.73" x 1.70"
Length: 45 mm
Width: 18 mm