Like do you use it?
1. Connected to the computer. (If the module is not recognized by the computer, install the driver first.)
2. Open the IDE and load the Blink sketch.
3. Set the board to Leonardo and select the appropriate COM port (it is already identified as Leonardo in the list).
4. Connect a LED to pin 9 and modify the sketch accordingly.
5. Press upload and within a few seconds the LED flashes.