This Kramer VP - 728 scaler/switcher comes with a correct power supply, but rack ears are not included. It's a great tool for professional presentation setups.

Using this Kramer VP - 728 scaler/switcher is easy. First, connect the correct power supply that comes with it to get it up and running. Then, plug in your presentation devices to the 9 inputs. When using, make sure the power supply is stable to avoid any glitches. As for maintenance, keep it in a clean and dry place. Wipe it with a soft cloth occasionally to remove dust. And remember, since rack ears are not included, you'll need to source them separately if you plan to mount it in a rack.