FTDI FT232RL USB Breakout Board with XBee socket - FOCA
The FTDI FT232RL is a USB to serial UART interface with optional clock generator output. It's the essential tools for establishing communication between PC and MCU. The best tool for board interfacing with a basic Arduino without it's own USB interface like Sniffer Nano, Colorduino, etc. * Xbee module not included