A 21 in deck with a 20 in 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 V Stihl® AP300 battery, the RMA 510 V can mow up to 2583 sq-ft on a single charge. With battery, users can enjoy instant starting, low noise, zero gasoline costs and zero exhaust emissions. 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 in rear wheels and 8 in front ball bearing wheels allow for mowing over rough terrain.