Soft tread adjustable wheels for smooth operation and pad pressure adjustment. Adjustable ergonomic handle for improved operator comfort. "Hot @ 4 o-clock" setup for true and straight operation. 34% more fuel efficient than the other national brands. 40% fewer oil changes than the other national brands. Catalytic muffler exceeds EPA and CARB minimum requirements. Easy access filters for simple cleaning. American made aluminum castings and sealed AGM battery. 12V battery start, Triple anchor welded handle.