Largest brush/pad selection, lowest maintenance cost, best performance on irregular floors, brushes individually driven. Inside the machine: See through lid, drain saver basket, stainless vac screen, 6' remote solution fill hose, adjustable steering wheel, patented vac protection, tall poly rollers, stainless break away squeegee, flip up bumper, poly battery box with drain, steel operator protection, patented service cabinet, brake lights, non-marking solid grey tires, steel frame.