This Sony HFU - X310 HD optical fiber interface unit comes with a correct power supply. However, please note that this unit has a high - pitched hum.

To use the Sony HFU - X310 HD optical fiber interface unit, first make sure you connect it to the correct power supply. Plug the power cord into the unit and then into a suitable electrical outlet. When using, be aware that you might hear a high - pitched hum, which is a known characteristic of this unit. For maintenance, keep the unit in a clean and dry place. Avoid exposing it to extreme temperatures or humidity. If you have any issues, contact Sony's customer service.