you don't need those features, because this is a < 5% THD generator, this is a MUCH better unit than the DuroMax deal at Ebay right now for $20 less. I have the larger 7000 watt version of this and looked at the output on an oscilloscope - it's actually a nice, relatively clean sine wave, unlike the rest of the ChinaGenerators. Costco has different alternators put on the units sold in their stores, so a model that is sold on Amazon and Costco may appear to be otherwise identical, but the Costco version is spec'd at < 5% THD and produces much cleaner power.