Is 2,500 W enough for a fridge?

Yes for most household fridges, which draw a few hundred watts running and a surge of roughly 1,000 to 1,500 W at startup. Add up surge watts for everything you plan to start at once and keep the total under the rating.

Can it run a window air conditioner?

Only a small unit, and only if its surge draw fits within the generator's peak output. Most 8,000 BTU window units are borderline; larger units need a bigger generator.

Is inverter power safe for laptops and phones?

Yes. Inverter generators produce steady, clean power, which is why they suit electronics. That is the main reason to pick one over a cheaper open-frame generator.

Mondawe does not publish a decibel rating, and independent measurements are scarce. Expect noticeably more noise under load than a Honda EU2200i, so plan on placing it away from tents and windows.

Can it be connected to a home transfer switch?

Only through a proper transfer switch installed by an electrician, and only for the circuits its output can carry. Never backfeed a house outlet with a generator.

What comes in the box?

Typically the generator, a funnel, tool kit and owner's manual. Confirm the outlet set and whether a parallel cable is included before buying, since listings vary.