Description: The Teensy is a breadboard-friendly development board with loads of features in a, well, teensy package. The Teensy 2.0 breaks out all of the IO available on the ATMEGA32U4 to breadboard-friendly 0.1" spaced headers so you can hook up a load of peripherals. The Teensy 2.0 comes pre-flashed with a bootloader so you can program it using the on-board USB connection: No external programmer needed! You can program the Teensy in your favorite IDE using C or you can install the Teensyduino add-on for the Arduino IDE and write Arduino sketches for Teensy! 8-Bit AVR Proceassor 16 MHz (ATMEGA32U4) Specification: Material: PCB Size: Approx. 0.35x3.1x1.8cm / 0.14x1.22x0.71inch 31.5K Flash Memory, 2.5K RAM, 1K EEPROM USB Can Emulate Any Type of Device Single Pushbutton Programming Arduino Compatible 12 Analog Inputs 25 Digital I/O Pins 7 PWM outputs SPI and I2C Package Includes: 1 Piece of Development Board