This Ross SHC - 9642 SDI to HDMI converter comes without a power supply. One thing to note is that the SDI In connector has a slight scrape, but it still works really well.

To use this Ross SHC - 9642 SDI to HDMI converter, you'll need to connect it to your SDI and HDMI devices. Remember, it doesn't come with a power supply, so you'll have to use your own. When you're connecting, be careful around the SDI In connector as it has a slight scrape. But don't worry, it still functions great. For maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or humidity. If you notice any performance issues, check the connections first.