The ONE+ 18-Volt 13 in. String Trimmer has a lightweight design making it portable and easy to use around your yard. The auto-feed line head will automatically advance the line. 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. With the press of a button the shaft rotates to an edger so you can quickly tackle your edging needs. The adjustable 11 in. to 13 in. cutting width allows you to optimize your trimmer for increased run time or a wider cut swath. This trimmer comes with a 4.0 Ah battery and charger. Backed by a 3-year warranty.