The brushless motor provides more power, longer runtime, and a longer motor life. It starts with just a push of a button, and with the self-propelled rear wheel drive, this mower increases your traction making it easier to maneuver and almost effortless to use. This mower is ideal for yards up to 1/3 acre, featuring dual active battery ports and two 40V 6Ah batteries that provide up to 70-minutes of runtime. The 21 in. steel deck is lightweight, resists corrosion, and is covered by a lifetime warranty. The mower has a 10 in. high wheel design and the deck features 7 position single point height adjustment to easily select your grass height between 1-3/8 in. and 3-3/4 in. With the 3-in-1 mowing functions you can choose between bagging, mulching, or side discharge functions. Includes 40V 5.0 Ah battery and charger and is backed by a 3-year warranty. Item assembled weight �C 83.78 lbs.Features of Greenworks 40V 21-inch Cordless Brushless Self-Propelled Lawn Mower:nbsp; Highly efficient brushless motor provides more torque, quiet operation and longer life Up to 30 mins. of runtime on fully charged battery Durable steel 21 in. cutting deck gets the job done quicker and more efficiently The convenient 3-in-1 cutting deck lets you choose your cut finish from mulching, bagging or side discharge Self-propelled drive system with variable speed rear-wheel drive lets you easily maneuver and tackle any terrain Single lever 7-position height adjustment from 1-3/8 in. to 3-3/4 in.nbsp; No gasoline, no pull cord, no spark plug, no maintenance Hassle free push button start Includes 5.0 Ah battery quick charger Item assembled weight – 83.78 lbs. 3-year warranty What’s Included: (1) 40V 21-inch Self-Propelled Brushless Cordless Lawn Mower (1) Grass Collection Bag (1) 5.0 Ah Battery (1) Battery Charger (1) Owner’s Manual