The RYOBI 40V HP Brushless 21" Self-Propelled Mower Kit delivers more power than a 163cc gas mower, making it a true gas replacement. The (2) included 40V 6Ah batteries give you up to 80 minutes of runtime for easily tackling up to 3/4 acre while utilizing two active battery ports. The brushless motor and advanced electronics automatically react to mowing conditions by increasing the blade speed to eliminate bogging down and powering through the toughest cut. Equipped with self-propelled rear wheel drive, this mower ensures an effortless, efficient mowing experience. The CUT COMMAND CENTER helps you monitor runtime and blade life, activate turbo mode and lights, & adjust self-propelled speed right at your fingertips. Achieve an extra boost to power through tough grass with the turbo mode. The 21" durable composite deck is lightweight, resists corrosion, and is covered by a lifetime warranty. When you are finished, easily fold the handles and store vertically for compact storage. Best of all, it is part of the RYOBI 40V system where any 40V battery works with any 40V product. This mower is backed by the RYOBI 5-Year Manufacturer's Tool Warranty, 3-Year Manufacturer's Battery Warranty, and includes RY40HPLM01 40V HP Brushless 21" Self-Propelled Mower, OP40605 (2) OP40605 40V 6Ah Batteries, OP406 40V Rapid Charger, Grass Catcher Bag, Start Key, Side Discharge Chute, and Operator's Manuals.