The RYOBI 40V HP Brushless 21" Self-Propelled Multi-Blade Mower Kit delivers more power than a 170cc gas mower. The (2) included 40V 6Ah batteries give you up to 75 minutes of runtime for easily tackling up to 3/4 acre while utilizing two active battery ports. Experience the industry’s best 3-in-1 cutting performance with the CROSS CUT™ Multi-Blade System. This allows for less clumping when mulching, further & more even dispersal when side discharging, and when bagging the fine clippings fill from back to front to maximize space for less bag changes. 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. SMART TREK™ adaptive variable speed self-propelled technology allows you to effortlessly adapt the mower's speed to your pace, so you can finish the job quickly, effortlessly, and for less fatigue. The CUT COMMAND CENTER™ helps you monitor runtime and blade life, activate turbo mode and lights, & adjust self-propelled speed at your fingertips. Achieve an extra boost to power through tough grass with the turbo mode. The One-Touch folding handles quickly and 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 40V HP Brushless 21" Self-Propelled Multi-Blade Mower is backed by the 5-year manufacturer’s tool warranty and 3-year manufacturer’s battery warranty.