The Worx Nitro WG753 40V Power Share Cordless 21″ Self-Propelled Lawn Mower with Rear Wheel Drive and 2X 5.0Ah Batteries has a highly-efficient brushless motor running 50% longer . churning out 25% more power . and providing 10% more life than brushed motors. With two high-capacity Power Share PRO batteries . this self-propelled mower is a worthy replacement to gas mowers. And does so without any of the drawbacks of gas . like the cost . mess . fumes . excessive volume . or extra maintenance. Full of quality-of-life features . like rear-wheel drive with a variable-speed control so the user can pick a pace that’s comfortable for them. Single-lever height adjustments and mode changes make switching between cutting heights (7-positions . 1.6 in.-4 in.) and cutting modes (bag/mulch/side-discharge) quick and easy. LED lights provide greater visibility when mowing at dusk or in other low-light conditions. Auto-Intellicut technology increases the speed of the blades when it detects thicker grass . then slows them back down when the mowing gets easier to conserve battery usage. And the one-touch fully-collapsible handle makes for compact . stand-up storage in the garage. The bag capacity is 2 Bushels . the wheels are 8 in. (front) and 10 in. (rear). The durable steel cutting deck is a wide 21 in. (20 in. cutting width) and great for lawns with rough terrain . and features Nutricut dual-stage mulching capabilities to return both water and nutrients back to your lawn.