The RYOBI 18V ONE+ 13" String Trimmer has a lightweight design making it portable and easy to use around your yard. With our auto-feed line head it will automatically advance the line whenever the trigger is released. This trimmer is also equipped with a variable speed trigger so you can have more control around fences, masonry, and other areas of your yard. Featuring a pivoting head, easily convert your string trimmer into an edger using the step to edge mechanism. The adjustable 11" to 13" cutting width allows you to optimize your trimmer for increased runtime or a wider cutting width. This trimmer comes with a 4.0 Ah battery and charger. The battery is compatible with the RYOBI 18V ONE+ system. Backed by a 3-year warranty.