This cordless grass trimmer is powered by a rechargeable low maintenance lithium-ion battery. The adjustable head can be rotated to four cutting positions, perfect for tackling the trickiest areas and tightest corners. The double nylon trimming line uses an automatic-feed system, so there is always the amount of spool you need for uninterrupted cutting. There is also an edge guard to adjust the line length and reduce wastage. The telescopic handle can be adjusted in length between 880-1470mm. D20 interchangeable battery system allows you to combine the same battery/batteries with any of the tools within the D20 series.