Product Description from Walmart
The Greenworks 40V 12" String Trimmer gives you the cordless convenience you want with the gas-like power you need. This unit is equipped with an auto feed head and requires very little maintenance, as there is not a need for oil, air filters or gas. This Greenworks string trimmer is under 10 lbs., runs on a battery and can start with the push of a button. While it is battery powered, it still delivers gas-like performance. The battery requires three hours to reach a full charge and allows the user to trim a lawn about half an acre in size. With a 12-inch cutting width, the lightweight string trimmer will be able to cut around flower beds and edges. It has a telescoping shaft that can adjust to various heights, as well. Backed by a 3-year warranty.