<b>Description:</b><br> 1. The Pro Micro is similar to the Pro mini except with a ATmega32U4 on board. The USB transceiver inside the 32U4 allows us to add USB connectivity on board and do away with bulky external USB interface. <br> 2. This tiny little board does all of the neat-o Arduino tricks that you're familiar with: 4 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as hardware serial connections Rx and Tx. Running at 16MHz and 5V, this board will remind you a lot of your other favorite Arduino-compatible boards but this little guy can go just about anywhere. If you're supplying unregulated power to the board, be sure to connect to the "RAW" pin on not VCC. <br> <b>Features: </b><br> ATmega32U4 running at 5V/16MHz<br> Supported by Arduino IDE v1.0.1<br> On-Board Micro-USB connector for programming<br> 4 x 10-bit ADC pins, 12 x Digital I/Os<br> Rx and Tx Hardware Serial Connections<br> <b>Note: </b> 1.When you open the Arduino IDE software, pls go to the tool and choose the board "Arduino Leonardo" <br> 2.The acceptable voltage range is 5 to 9 V.<br><b>Package included: </b><br> 3* Pro Micro ATmega32U4 5V/16MHz Development Board<br>