To use this BSS London BLU - 800 Signal Processor, first make sure you connect it to the correct power supply that comes with it. Just plug it in and you're ready to go. When using, keep it in a dry and cool place. Avoid exposing it to direct sunlight or extreme temperatures. For maintenance, you can use a soft, dry cloth to clean the exterior regularly. If you encounter any problems, disconnect the power supply first and then check the connections. That's all you need to know to keep this signal processor working well.