To use the Klark Teknik DN9650 Digital Audio Network Bridge, first connect it to a power source using the included power supply. Make sure it's properly plugged in. When using it in a network, follow the standard network connection procedures. Note that this unit doesn't have a Network Module, so you'll need to manage your network setup accordingly. For maintenance, keep it in a clean and dry place. Regularly check the power supply and connections for any signs of damage. If you encounter any issues, consult the official support or a professional technician.