Can't remember what it is. I had an ISSA one and have the Eastern Trading one both similar - three motors. I think one is 3200w and the other was 3600w. Both had crappy trolleys and are too big to keep in the van.
Local guy to me has a skyvac I think (and a massive van) -has a much better trolley on it, might be a big Nilfisk and has the bigger inlet fitted.