Just the squeeze of a lever engages the RMA 510 V battery-powered lawn mower’s efficiency driven performance, helping reduce user fatigue commonly caused by traditional push mowers. A 21-inch deck with a 20-inch cutting width makes the RMA 510 V highly maneuverable and able to quickly cover small-to-medium size yards. The mower’s self-propel function features a variable speed setting control, allowing the user to choose a mowing speed between 0.6 mph to 2.8 mph. With the 36-volt STIHL AP 300 battery, the RMA 510 V can mow up to 2,583 square feet on a single charge. For added convenience and customization, the deck of the RMA 510 V is adjustable to seven different cutting heights. The handlebar adjusts to three height positions for user comfort. Durable, 10-inch rear wheels and 8-inch front ball-bearing wheels allow for mowing over rough terrain. Run time may vary based on battery type, charge level and capacity, model, operating style and conditions. Batteries and chargers can be purchased separately or as a combined set with tool. What's Included: Mulching Kit Self-propelled with variable speed drive - a squeeze of the self-propel lever propels rear-wheel drive lawn mower forward Brushless electric motor with ECO mode - the motor automatically reduces power when mowing through light grass and adjusts to full power in taller or thicker grass Zero or low exhaust emissions Mower can be stowed in three positions: folded or unfolded on all four wheels or upright and folded in the cleaning position with blades facing the wall to save floor space Locking key - key prevents accidental starting of the motor No gradual drop in power, so you can work at full speed until battery is depleted Battery and charger sold separately