Arduino Pro Micro ATmega32U4 5V/16MHz

This Pro Micro compatible board is quite similar to the Pro Mini, except that it has an ATmega32U4 on board. The 32U4 has built-in USB transceiver, thus eliminating the need for a secondary processor, and allows the Pro Micro to appear as a mouse and keyboard on connected computer. Specifications: ATmega32U4 running at 5V/16MHz Supported under Arduino IDE v1.0.1 On-Board micro-USB connector for programming 4 x 10-bit ADC pins 12 x Digital I/Os (5 are PWM capable) Rx and Tx Hardware Serial Connections Over current protected Reverse polarity protected DC input 5V up to 12V On board Power and Status LEDs Size：33mm x 18 mm x 6mm