A distinct black grill marks the Force II. Unlike metal housings, the proven housing features a smooth, rounded design that eliminates air voids, reduces noise and increases output efficiency. At the heart of the Force II is a new single shot, closed face fan. At 16 blades, Billy Goat has 2x as many blades as the competition. No wonder, it\'s the most productive unit on the market. And, while the Force is already the lightest and easiest to push unit on the market, we\'ve managed to lighten your load another 9lbs, plus we\'ve made it easier to start. The result is another jump in productivity, better ergonomics, reliability, and consistent fan technology across the entire range!