The YOUWE 40V Chainsaw is suitable for sawing and pruning small and medium trees. It is the perfect tool for every gardener, tradesmen, handy men, or serious DIY enthusiast. With this chainsaw, you have all the advantages of a petrol chainsaw, but without the emission of harmful gasses. It has the power of a 40V chainsaw, but with the convenience of a 20V Li ion battery. The 40V chainsaw has a brushless motor, which provides more power, a longer runtime, and a longer life. The Brushless motor, together with the automatic oil lubrication, provides a chainsaw with reduced maintenance and makes it suitable for continuous use. When you have to tension the chain, or replace the chain sword, you do not need additional tools.