The RYOBI 18V ONE+ HP Brushless 20" Self-Propelled Mower delivers more power than a 150cc gas mower, making it a true gas replacement. With (2) included 18V ONE+ 6Ah batteries, this mower provides up to 40 minutes of runtime, making it perfect for lawns up to 1/2 acre. 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. It utilizes two batteries at a time with its dual active battery ports for ultimate power. For your utmost convenience, adjust the height of your cut with the 7-position single point height adjustment. When you are finished mowing, easily fold the handles and store vertically for compact storage. Best of all, it is part of the RYOBI 18V ONE+ system where any 18V ONE+ battery works with any 18V ONE+ product. This mower is backed by the RYOBI 3-year manufacturer’s warranty and includes PBLLM05 18V Brushless 20" Self-Propelled Mower, (2) 18V 6Ah Batteries, (2) 18V Chargers, Grass Catcher Bag, Mulch Plug, Side Discharge Chute, Start Key, and Operator’s Manuals.