Perfect for yards up to 1/2 acre, Greenworks™ 40-volt tools are lightweight, start instantly, and require virtually no maintenance (no oil changes, no air filters, no gas cans, etc.), while still delivering gas-like power. With a collection of more than 40 lawn tools, one battery powers all the tools you need. Powered by a 40-volt lithium-ion battery, the Greenworks™ 40-volt 12-inch string trimmer delivers up to 30 minutes of runtime. It starts with the pull of a trigger with no need to mess with oil and gas. It's powerful, efficient, lightweight, and hassle-free, so you spend less time working on your lawn and more time enjoying the results.