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.