CORDLESS 20” LAWN MOWER – Get more done, faster, with Greenworks electric lawn mowers. This 40V push mower provides the power you need with up to 45 minutes of run-time on a fully charged 4.0Ah and 2.0Ah battery.Brushless motor : No.No load speed : 6000 RPM LIGHTWEIGHT, EASY TO USE – a lightweight 20” cutting deck allows for easy maneuvering through small to medium yards (up to ½ acre) more efficiently TWIN BLADES - offer better cut quality, superior mulching, and bagging capabilities AUTO SWITCH / SMART CUT TECHNOLOGY – dual battery ports with auto switch allows for uninterrupted mowing. Smart cut technology adjusts for power or runtime based on the thickness of your grass MAINTENANCE FREE – This walk behind lawn mower is virtually maintenance free, with no gas, no oil, and no emissions. It starts instantly and is quiet, but delivers gas-like power for your toughest projects