80V 21”Cordless Battery 4-in-1 Self Propelled Lawnmower w/4.0AH and 3.5Ah Batteries &Raid Charger. 4-in-1 System: Mulch, Bag, Side Discharge, Turbo Leaf Pickup. Dual battery ports with Auto Switching technology- when one battery depletes the mower’s power supply is automatically switched to the second battery. Single lever 7-position height adjustment offers a range of cutting heights to meet your specific needs. Push Button Start- Press and mow, no more cord yanking.