My biggest shock when I unpacked it was that it worked. GENERAL! In fact it works perfectly. Easily powers any standard 110V load you would normally plug into a wall outlet. Compressor, angle grinder, saw. anything. I was curious to see what was going on inside so I removed the top. I'm glad I did. The solder on the socket (the ground pin is not connected to anything) turned out to be of poor quality. It didn't take much effort, I couldn't be happier with it!