The Roland V-800HD video switcher offers 4 HD-SDI inputs, 4 DVI inputs or 4 VGA inputs, 2 DVI outputs, 2 HD-SDI outputs, 1 HDMI multiview, and 1 composite output. It comes with the correct power supply. However, be aware that SDI Input #3 is non - functional.

Using the Roland V-800HD is easy. First, connect your devices to the appropriate inputs, like HD - SDI, DVI, or VGA. Then, use the controls to switch between different video sources. When using the HDMI multiview, you can view multiple inputs at once. Make sure to use the provided correct power supply to avoid any power - related issues. As for maintenance, keep the device in a clean and dry place. And since SDI Input #3 doesn't work, don't try to use it to prevent potential problems.