Greenworks 40V 21″ Brushless Self-Propelled Lawn Mower + 5.0 Ah Battery & Charger – powerfully smart. Tackle the toughest yards . one-handed . because our smart mowers never bog down. When grass gets thick . tall . or wet . Greenworks sensors tell our brushless motor to rush power to the mower blades. The end result? The perfect lawn . every time. Powerfully tough. The deck is forged with heavy-duty steel . ready to tackle any terrain. Add in algorithms and a brushless motor to reach unrivaled blade speed. Ka-pow! Powerfully easy. Simple to start with just the push of a button. Effortless to mow because it’s self-propelled . no sweat! Gentle on the ears because it mows quietly. A cinch to store in small spaces . you can even hang it up if you want to. Additional features include a The convenient 3-in-1 cutting deck lets you choose your cut finish from mulching . bagging or side discharge. Zero gas smell. Zero pull cords. Zero maintenance. Zero pollution breathed. Zero time wasted.