This Panasonic AG - BS300 Digital Base Station comes with a correct power supply. A minor issue is that the knob cap for the menu select wheel is missing, but it doesn't impact the unit's functionality.

Using the Panasonic AG - BS300 Digital Base Station is easy. First, connect it to the correct power supply that comes with it. You can operate the menu without the knob cap as it doesn't affect how the unit works. When using it, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or moisture. For maintenance, you can gently wipe the exterior with a soft cloth every few months. If you have any problems, consult the manufacturer's support.