Using this adapter is easy. First, plug the Micro - HDMI end of the adapter into your Raspberry Pi 4B. Then, connect an HDMI cable to the HDMI end of the adapter and the other end to your display device. That's it! As for maintenance, keep the adapter in a dry and clean place. Avoid exposing it to extreme temperatures or moisture. When handling, be gentle with the gold - plated interface to prevent scratches. If you notice any issues with signal transmission, check the connections first to make sure they are secure.