Synchronous Display: This VGA adapter is the first one that can achieve synchronous display function. You can not only use VGA or VGA to HDMI single display function, but also VGA and HDMI synchronous display function. [Note: HDMI and VGA displays can only show the same images] Plug and Play: No external drivers required. Easy operation and convenient use. Connect the HDMI/VGA/Audio port with other corresponding output devices, such as HDTV, projector, monitor. How to Use Audio Output: If you connect VGA individually, please connect input device's audio jack to external speakers to output sound; If you connect VGA to HDMI, please connect adapter's audio port to external speakers to output sound.