Is the HY350GT really 4K?

No. The panel is native 1080p and it accepts 4K input, downscaling it to 1080p. You get a sharp full-HD image, not native 4K detail.

Do I need a streaming stick?

No. Smart streaming apps are built in, so it works on its own over Wi-Fi. A stick is only worth adding if you want apps the built-in system lacks.

How does auto focus work?

The projector adjusts focus itself, which helps after you move it or change its distance from the wall. You can still fine-tune focus manually if needed.

Can I use it in a bright room?

It performs best in a dim or dark room. In daylight or with strong ambient light the image looks washed out, which is typical for projectors in this class.

What comes in the box?

The projector and a remote control are included. Check the listing for the power cable and any other accessories.

How does it compare with a 4K projector?

A native 4K projector gives finer detail and usually more brightness, at a higher cost. The HY350GT trades that for a lower-cost 1080p picture with smart features and autofocus.