Technical Details: <br> Microcontroller: ATmega328 <br> Operating Voltage: 5V <br> Input Voltage (recommended): 7-12V <br> Input Voltage (limits): 6-20V <br> Digital I/O Pins: 14 (of which 6 provide PWM output) <br> Analog Input Pins: 6 <br> DC Current per I/O Pin: 40 mA <br> DC Current for 3.3V Pin: 50 mA <br> Flash Memory: 32 KB (ATmega328) of which 0.5 KB used by bootloader <br> SRAM: 2 KB (ATmega328) <br> EEPROM: 1 KB (ATmega328) <br> Clock Speed: 16 MHz <br> <br> Package included: <br> 1x SunFounder R3 (compatible for Arduino )<br><br>For more information, please view at<br>http://wiki.sunfounder.cc/index.php?title=Main_Page