The Lakewood is fully functional. That's for $30. I took pictures of all power settings lighting up, but my car's jump-starter pack doesn't have the juice to activate anything else. (Heater's in storage.)
The other (Kenwood) was fully functional, but running the power cord under a carpet turned out not to be a good idea. I didn't like the wear that developed, so I chopped that part out of the cord and tried to fuse them back together. I wasn't good at that part. Since I only needed the other one at that time, that ended my use of the Kenwood. (Surge/Noise Suppressor included.)
The deal is: if you buy the first one, you can have the Kenwood for $10.
Both are in storage, so you'll have to bring an adequate power supply if you want to test them on site.