Can I put this in direct sunlight?

No. At 500 nits it is meant for shaded or covered areas. In direct sun the picture will look washed out; a brighter full-sun outdoor model is the better fit there.

Is it fully waterproof?

It carries an IP54 rating, which means dust-protected and resistant to splashing water. It handles rain on a covered porch but should not be hosed down or left exposed to driving rain.

Does it work in cold winters?

Yes. The rated operating range is -22°F to 122°F, so it can stay mounted through freezing winters and hot summers within that window.

Do I need a streaming stick?

No. It runs Google TV with access to the Google Play Store, so you can install streaming apps directly on the set.

What comes in the box?

The set and a remote control. Plan on sourcing a mount and any cabling separately.

How does it compare with brighter outdoor TVs?

It trades peak brightness for Mini LED local dimming and Dolby Vision, which helps contrast in shade. If your wall gets hours of direct sun, a higher-brightness outdoor model will hold up better.