Using this Studer card is easy. First, find a suitable slot in your D21m Modular I/O System and carefully insert the card. Connect your microphones or line - level devices to the four analog inputs. When using, make sure your devices are powered off to avoid any electrical issues. For maintenance, keep the card in a clean and dry environment. If it gets dusty, you can use a soft, dry cloth to gently wipe it. Avoid exposing it to extreme temperatures or humidity as this can damage the components.