Picoino USB to FTDI (Serial) Breakout Programming Board Module. Arduino Compatible. 3.3V and 5V switchable Power. You get: USB FTDI programmer module with 5 connection wires (VCC,GND,RX,TX,Reset/DTD/GRN), instructions, link to our usb-driver download section. New: Board comes in compact USB plug case for easier grip and protection. Can be used to apply a USB / FTDI (serial) programming connection to mcu boards like our Picoino Pro Mini Arduino compatible board. Best USB module to use with our Picoino Pro Mini board. With the Pro Mini and this board you get a full Arduino compatible development environment! Switchable voltage: 3.3 or 5 volts! Very convenient. Picture with Example is just for your information. External parts don't come with it. Color of case is random.