Arduino Nano Leonardo

ATMega 32U4 running at 5V/16MHz
Supported under for Arduino IDE v1.0.1
On-Board MINI USB connector for programming
4×10-bit ADC pins
12×Digital I/Os(5 are PWM capable)
Rx and Tx Hardware Serial Connection

Board Size: 33.1mm*17.9mm
Microcontroller:ATmega32U4
Operating voltage:5 V
recommended input voltage:5 - 12 V
Digital inputs and outputs (I / O pins):12 (including 5 PWM outputs)
Analog inputs:4
Current per I / O pin:40 mA
Flash Storage:32 KB, of which 4 KB are used by the boot loader
SRAM:2.5 KB
EEPROM:1 KB
Clock rate:16 MHz