<b>NOTE:</b><br /> <br /> 1. Since windows are frequently updated, you may need to download a driver to use this adapter. (There is an installation tutorial in the user manual)<br /> 2. After adapter is inserted into PC, press switch for a few seconds, and tindicator light starts to flash. If indicator not light up, you need to install a driver for your PC.<br /> 3. Other audio functions may require controller firmware update.<br /> 4. After the wireless adapter plugged in, Device Manager shows XB ACC, it means that you need to updated drivers.<br /> 5. Please read the user manual before use, it will help you to use this product better.<br /> 6. Contacting us will be the fastest way for you to solve the problem.<br />