Powerful 40V Performance – This chainsaw is powered by an interchangeable 40V advanced lithium-ion battery, delivering reliable and long-lasting power. It features a heavy-duty .043 gauge 16 chain and bar for exceptional cutting performance. Efficient Brushless Motor – The highly efficient brushless motor provides increased torque, quiet operation, and extended motor life. With chain speeds up to 11 m/s, you can make quick and easy cuts, completing tasks faster without disturbing neighbors. Impressive Cutting Capacity – Achieve up to 140 cuts through a 4 x 4 piece of pressure-treated lumber on a single charge of the 40V 4.0 Ah battery (battery and charger not included), ensuring efficient and effective performance. Enhanced Safety Features – Enjoy quick and easy side-mounted tool-less chain tensioning for effortless maintenance. Equipped with an active chain brake for added safety, and an ergonomic wrap-around handle for comfort and control during use. Automatic Oiling System – The automatic oiler applies oil to the bar and chain as needed, enhancing durability and extending the chains life. The translucent oil tank allows for a clear view of the oil level, making maintenance simple and hassle-free.