Great product, I had a bit of a dent but I guess that is on the transportation company, doesn't affect the value for me, indeed as other people commented the dial in the top is not accurate to the voltage outputted without load, but I'm guessing that they are compensating for 1KW power it has since such load will make the voltage fall of, I haven't tested it but I'm expecting this is the case and underuse the voltage should be pretty accurate!