Designed to quickly cut large yards, this 2X20V MAX Brushless Cordless 21-1/2 in. Rear Wheel Drive Self-Propelled Mower delivers mowing power and ease of use when tackling demanding yardwork. Auto-sensing technology helps you maintain high rpm while working for steady cutting even when mowing dense, thick grass. Mulch, bag, or use the side discharge with 3-IN-1 functionality and conveniently transport or store when the job is done using the fold-over handle and lift handle