1.Microcontroller: ATmega328.

2.Operating Voltage: 5V.

3.Input Voltage (recommended): 7-12V.

4.Input Voltage (limits): 6-20V.

5.Digital I/O Pins: 14 (of which 6 provide PWM output).

6.Analog Input Pins: 6.

7.DC Current per I/O Pin: 40 mA.

8.DC Current for 3.3V Pin: 50 mA.

9.Flash Memory: 32 KB (ATmega328) of which 0.5 KB used by bootloader.

10.SRAM: 2 KB (ATmega328).

11.EEPROM: 1 KB (ATmega328).

12.Clock Speed: 16 MHz.