The RYOBI 40V HP Brushless 20" Self-Propelled Lawn Mower Kit delivers more power than a 150cc gas mower, making it a true gas replacement. The included 40V 6Ah battery gives you up to 45 minutes of runtime for easily tackling up to 1/2 acre. RYOBI 40V HP Technology utilizes a brushless motor & advanced electronics that automatically react to mowing conditions by increasing the blade speed to eliminate bogging down & powering through the toughest cut. Equipped with self-propelled rear wheel drive, this mower ensures an effortless, efficient mowing experience. The single-point height adjustment allows you to easily select the perfect height for your lawn. When the job is done, the handles easily collapse for compact, vertical storage. Best of all, it is part of the RYOBI 40V system where any 40V battery works with any 40V product. This self-propelled mower is backed by the RYOBI 5-Year Manufacturer's Tool Warranty, 3-Year Manufacturer's Battery Warranty, and includes 40V Brushless 20" Self-Propelled Lawn Mower, 40V 6Ah Lithium Battery, 40V Fast Charger, Grass Catcher Bag, Start Key, Side Discharge Chute, Wrench, and Operator's Manuals. Additionally, complement it with the RYOBI 20" - 21" Lawn Mower Striper for professional-looking stripes. It's easy to install and use, with a funnel to fill it with sand or water (up to 25 lbs). Compatible with RYOBI 20" & 21" mowers, the striper includes the striper, funnel, and manual.