There are a number of different models in their current lineup. Used to be just the one, tried and true Skilsaw, the 77. Now they have at least a half dozen models, some that cut metal, even a worm drive jobsite table saw.
You didn't mention which particular model you were looking at or if you had an older model. Mine is over 20 years old and still going strong, but weighs a ton compared to the newer models.
Anyway, I went to their website and looked at two different manuals and there was no mention of power requirements, current draw, etc. It does say on the website that it draws 15A, but doesn't give a voltage or frequency. No specs page in the manuals either.
Probably best to drop them an email or message on FB. They respond there in a reasonable amount of time. I have asked them a couple questions on their new recip saw and got a reply in an hour or two. But I have found that the people tending to their FB presence don't always have a depth of knowledge to answer all questions and you may have to wait for an answer.