USB UART click (MIKROELEKTRONIKA)

USB UART Click is an accessory board in mikroBUS™ form factor. It’s a compact and easy solution for adding serial UART communication via USB cable. It features FT232RL USB-to-UART interface module as well as USB MINI B connector. USB UART Click™ communicates with target board via UART interface. The board is powered with 5V power supply, but is designed to use 3.3V or 5V I/O levels (selectable via SMD jumper). It has a LED diode (GREEN) that indicates the presence of power supply. The board contains RX and TX LED diodes that indicate the transmit and receive data via USB.

http://www.mikroe.com/eng/products/view/937/usb-uart-click/