The 21-inch Brushless Adaptive Speed Mower is ideal for yards up to 1/2 acre or up to 30 minutes of runtime. Brushless technology provides consistent power without bogging down, and extended motor life for many seasons to come. With Adaptive Speed Self-Propelled Technology, this tool adjusts to your pace instantly. Height modifications are easily made with the innovative one-handed single-point height adjustment trigger handle (1-inch – 4-inch) instead of adjusting each of the 4 wheels individually. On-board battery storage carries two batteries at once which allows you to continue mowing when one of your batteries runs out of power. For compact and easy storage in your garage, this mower is equipped with folding handles and outfitted with a steel deck for ultimate durability. Choose how you want to mow with bagging or mulching capabilities. All a part of the 40V System where you get ALL POWER, NO GAS. Includes 21-inch brushless adaptive speed mower, (1) 5.0Ah battery and charger.