I bought myself some Christmas presents and decided to test it out. It's a portable electric pressure washer and a foam cannon. This works great for removing caked on dirt and road grime. Just spray the foam on, let it sit for 5 minutes or so, wash it off, then hand wash your truck like usual. This method of washing reduces scratches on your paint because the majority of the dirt is already removed from the foam soap and pressure washer. It's kind of hard to see the foam because my truck is already white, but it's awesome!