ATMega32U4 running at 5V/16MHz, maximum voltage on the RAW pin is 9V, recommended voltage 6-7V. | Supported by Arduino IDE V1.0.1; 4 x 10-bit ADC pins, 12 x Digital I/Os; Rx and Tx Hardware Serial Connections. | Just connect to the On-Board micro-USB connector for programming. (If this module cannot be recognized by your computer, please refer to this link to install the driver https://www.arduino.cc/en/Guide/DriverInstallation) | The PRO Micro board can be powered via the micro USB connection or with an external power supply. | Please click the [Tool] and choose the module [Arduino Leonardo] when you open the Arduino IDE software.