The RYOBI 40-Volt trimmer combines cordless convenience with exceptional run time. With a 40-Volt high-capacity battery, this string trimmer has more run time than most gas trimmers with fade-free power. It features an auto-feed string head that advances line with the pull of the trigger and accepts any of the RYOBI auto-feed spools for quick and easy reloads. The RYOBI 40-Volt trimmer has a variable speed trigger, providing you with ultimate cut control. All this performance and convenience, backed by a 5-year limited warranty, makes this the perfect time to go cordless.