Hi victor first and most important is what do you expect to run with this generator Presumably a refrigerator. Unless you have a modern small fridge, I'd bet you won't get much more than the fridge and a few moderate lights out of 850 watts.
Fridge and microwave? forget it! In the specs you pasted, I didn't see anything about whether it's A.C. output is sine wave, simulated sinewave, or not stated. If you're running much in the way of electronics, you'd better go for a unit that generates a pretty good sinewave. This is particularly true of gear that has transformers in it's powersupply. I'd steer clear of 2 stroke engines if possible unless they are stated to be of the very newest cleaner running units. They're dirty and stinky. this would be considered a truly minimalist generator, really not intended for long term home use. If all you expect is shorter term use with not much load, it may do. Good one's cost a lot, luckilly I don't need one here. best Tom Fowle