That depends on one number: how far back the projector can sit indoors. Use the throw chart above — set your window width and your throw distance and it tells you the projected image width in inches and whether it fills, overfills or falls short, plus how far to move to fix it. Most standard front windows fill from six to eight feet back.

Project onto the inside of the glass after dark and pull the curtains or blinds behind the projector so no room light spills in, and use a rear-projection screen or a plain white sheet across the pane rather than bare glass. Bare glass scatters the image; fabric holds it.

Ten minutes the first night. Unbox, sit the projector on a table facing the window, plug it in, connect to your wifi, and play your video from the built-in player, from a USB stick or cast from your phone. Nothing to mount, nothing to assemble.

The projector on its rotating stand, the remote, the power cable and the quick start guide. The only thing worth adding is a screen for the pane.

Anything you can stream, cast or load onto a USB stick. Halloween window loops are widely available online; the projector loops them from the built-in video player, so you can start it at dusk and leave it alone.

It is a projector with a smart OS and a speaker, so no. Eleven months of the year it is a movie-night box for a wall, a ceiling or a garden fence.

Thirty days, no questions asked. Send it back and you get your money back, including if it turns out your window simply cannot take a projector.