The RYOBI 40V HP Brushless 21" Self-Propelled Mower delivers more power than a 163cc gas mower, making it a true gas replacement. (2) 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 (batteries not included). 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 and adjust your speed, runtime, turbo mode, lights, and blade life 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 and includes RY40HPLM01 40V HP Brushless 21" Self-Propelled Mower, Grass Catcher Bag, Start Key, Side Discharge Chute, and Operator's Manual. Battery and charger sold separately.