This is pretty much the same tire inflater that Harbor Freight is selling but with the Slime name on it. At Harbor Freight it goes down to $30 fairly regularly. I use this in my car and it works well. I tried it on one of my 80 psi RV tires and it did strain and got hot, but it did add the air I needed to the tire. I would not try it if inflating a flat tire. Lowes sells a pretty good inflater for $39 and it will work on DC or AC. I use this for my RV with good results and it gets good reviews. Never plug any of these into a cigarette lighter socket - it must be in an appliance socket with 15 amps or higher.
Robert
11C190P