Using this cable is a breeze. First, find the Micro - HDMI port on your device like Raspberry Pi 4B and plug in the 24K gold - plated Micro - HDMI male end of the cable. Then, connect the standard VGA female end to the VGA port of your monitor. You can connect your headset or audio device to the audio holes for sound. There's no need to look for an external power source; just insert it properly and you're good to go. As for maintenance, keep it away from sharp objects to avoid damaging the cable. Also, don't bend it too sharply. When not in use, store it in a dry place to prevent corrosion of the gold - plated parts.