Small, versatile and ideal for breadboard-based projects, this board uses the Arduino-compatible ATmega328P and CH340 chips. Powered can be delivered through the mini-USB connector, a 6-20V unregulated external power supply on pin 30, or a 5V regulated external power supply on pin 27. The power source is automatically selected to the highest voltage source
Comes in blue or black. Mini-USB cable is not included.