Electric lawn mower mulching mower motor mower series wolf garten expert cutting width 37 cm max lawn area 450 m min cutting height 25 mm max cutting height 80 mm cutting height steps 5 positions rotational speed 2 950 rpm power watt 1 700 watt discharge rear discharge grass box capacity 55 litres start system electric start features central cutting height adjustment height adjustable handle safety feature engine stop blade brake housing materi