What does ultra short throw mean here?

The projector is placed close to the wall or screen and still projects a large image. That removes the long throw distance a normal projector needs and keeps the beam out of walking paths.

Do I need a special screen?

An ultra-short-throw projector works best on a flat, matte surface or a dedicated UST screen. A plain white wall works for casual viewing, but a screen improves brightness and uniformity.

Can I use it in a bright room?

It is best in a dim or dark room. In daylight or with strong lamps on, the image will look washed out, which is typical of projectors in this class.

What connections does it have?

Connections vary by the configuration you choose. Check the listed ports for the version you pick before ordering so it matches your streaming stick, console or laptop.

Does it come with everything needed to start?

Included accessories depend on the selected package. Confirm what ships with your version, and plan on a screen or flat wall plus a sound option if you want better audio.