Support for the . IDE 1.0+ (OSX/Win/Linux).
Power via USB or External Source - 5v or 7-35v (automatic selection).
On-board 500ma 5V Regulator.
Built-in USB (and serial debugging).
6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB).

Development board using the ATMEL ATtiny85 microcontroller. It has its own USB bootloader and built in USB capability, you can program it for Compatible with Arduino SDK and also use it as native USB device.
8k Flash Memory (about 6k after bootloader).
I2C and SPI (vis USI).
PWM on 3 pins (more possible with Software PWM).
ADC on 4 pins.
Power LED and Test/Status LED (on Pin0).
Size: 0.71x1.05in
Colour: as shown
Material: PC+metal

Package Contents:
5 * Micro-USB Development Board (with Pins)