Heavy duty die-cast aluminum brush deck. Variable 66 lb or 99 lb pad pressure. Delayed vacuum motor shut off eliminates pooling. Filter assembly and auto-float shutoff protects vacuum motor. Two pad pressure settings for flexible cleaning. 150 AH batteries, on-board charger, pad drivers, and squeegee assembly included. Quickly change-out squeegees, pads, or brushes without tools. 5 year warranty on all parts and labor with the exception of "wearables" such as brushes, pad drivers, batteries, hoses, belts, and switches.