Using the UREI Model 562 Audio Feedback Suppressor is easy. First, make sure you connect it to the correct power supply that comes with it. This will ensure stable performance. When you're using it in a sound system, just place it in the appropriate position according to your setup. As for maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or humidity. If you notice any issues, check the power connection first. With proper use and care, this feedback suppressor will serve you well for a long time.