Electric lawn mower mulching mower series wolf garten expert cutting width 37 cm max lawn area 250 m min cutting height 20 mm max cutting height 60 mm cutting height steps 5 positions rotational speed 2 950 rpm power watt 1 600 watt discharge rear discharge grass box capacity 34 litres start system electric start features central cutting height adjustment height adjustable handle safety feature engine stop blade brake housing material plastic