The Stihl RM545 OVE is great mower for medium sized lawns and is ready to go at the push of a button This comfort is achieved by the InStart system, which starts the engine with the aid of a battery. Its Variable speed drive with super soft grip and easy running wheels make it a very comfortable lawnmower to use. he extremely sturdy, height adjustable mono-comfort handlebar increases access to the grass catcher box making emptying the grass even easier to access The hardened lightweight polymer deck males it immune to rust providing a greater life span of the mower.The central cutting height adjustment can be adjusted to the desired lawn height in six settings There is also a grass level indicator on box to show you when the grass catcher needs to be emptied