Product review (5 stars): Cheap and does the job
Works perfectly. It arrived in a package that states 24" but it is indeed a 21" ductless range hood. If you have a small kitchen with 21" cabinets and cannot hook a duct this is what you need. No more smoke detector beeping, no more grease on the wall. The smoke goes up right in and disappears.

Relevant information: it comes with a filter, no light bulb (but you can put in any you already have). Electric, it comes with 2 whites (light and motor), 1 hot, and 1 ground, all very short, so you will have to hook your own electric cables to the box. I personally chose to cut a $10 grounded extension cord and hook up the cables together so I can just plug it in an outlet (way easier).