Enter the 40V System with the RYOBI 40V Lawn Mower. This compact and lightweight mower provides up to 30 minutes of runtime with the included 40V 6Ah battery, giving you gas performance with the push of a button with no hassle or maintenance. With seven different height positions ranging from 1.5 to 4 inches, you can quickly select the perfect height for your lawn with the single-point height adjustment. Plus, the RYOBI 40V system lets you use any 40V battery with any 40V product, making it easy to switch between tools. Get peace of mind with a 5-year manufacturer's tool warranty and a 3-year manufacturer's battery warranty, and get everything you need with the included RY401010 40V 18" Lawn Mower, OP40605 40V 6Ah Lithium Battery, OP404 40V Charger, Start Key, Side Discharge Chute, and Operator's Manuals.