4 Cylinder Kohler water cooled generator. Cranks up every time. Runs very quietly for the size. Comes mounted on a trailer. This was used to power a house close to the gulf for several days when a hurricane came through. You can hook up a larger box to get more plugs...it only has 2 plugs on it right now I think. This thing has enough power to get just about anything accomplished. I am sorry that I don't have the exact wattage, etc on this. I think my dad paid about $4,000+ for it (might have been $5,000). $2,000!