It’s blue! It’s thin! It’s the Arduino Pro Mini! Zeroohm offers a new kit for Arduino Pro Mini. The Kit provides is a 3.3V Arduino running the 8MHz bootloader. Arduino Pro Mini minimize the cost and the volume of your Project. And don't forget that you need to connect it to the FTDI Basic Breakout board to connect it to your PC for programming. And as an option the kit provide you with a break away headers that you can solder them to you Pro Mini.