Johnson crafted the "JLX" series of products to meet the demands &exceed the expectations of professionals, &the 40-6681 is no exception. It features "GreenBrite" technology, making the beam 400% more visible than red beams for working in sunny or brightly lit conditions. It projects a cross-line with 180 coverage on the horizontal beam. With the included magnetic base, magnetic target, Lithium Ion battery &charger, &alkaline battery compartment, this kit comes with everything you'll need to get your job up &running.Includes: Green laser with magnetic base, magnetic target, li-ion battery and charger, alkaline battery compartment (alkaline batteries not included), hard-shell carrying case.