This Kramer VP - 470 unit is a professional 3G HD - SDI digital scaler. Note that it doesn't come with a power supply.

To use this Kramer VP - 470 digital scaler, first, you'll need to connect it to an appropriate power source as it doesn't have a power supply included. Then, connect your HD - SDI devices to the scaler. You can start scaling your video signals easily. Remember to handle it gently to avoid any damage. When it comes to maintenance, keep it in a clean and dry place. Regularly check the connections to ensure a stable performance. If you have any issues, don't try to repair it yourself; instead, contact a professional technician.