This is a FTDI FT232RL usb/serial chip embedded in a cable that has a 6-pin socket at the end. These are perfect for use with a Boarduino, Meggy's, or other Arduino clones, and Fuzeboxen. Useful whenever you want to communicate with a TTL serial device, such as an XPort, GPS, XBee or SIM module through a breakout board. You can also easily modify this cable into a propller chip programmer (note that the YBox2 kit does not require a programmer to change widgets).USB TTL-232 cable

USB TTL-232 cable 5V/3.3V

The version we have is the 5V(we used to carry the 5.0V) the only difference is that the 3.3V cable sends data signals at 5V levels instead of 5V. It is 5V compliant which means that it can receive 5V signals no problem. The power line still provides 5V. USB TTL-232 cableBasically, it works just as good as the 5.0V version, but is better for projects and devices that need 5V signals.