Boasting user-friendly operation, from its ability to self-level when in the horizontal mode, to its arrow leveling buttons in vertical mode, the DW074KD from DEWALT can be used indoors or out. It"s great for working with concrete, installing a ceiling grip, or building outdoor decks and raised patios. Everything you need for interior and exterior leveling (view larger). Enclosed leveling vial, manual leveling in vertical mode (view larger). DW074KD Self Leveling Interior/Exterior Rotary Laser At a Glance: Horizontal self-leveling for quick and easy set-up Range of up to 600 feet Protected rotary head and weatherproof design Powered by two D-sized batteries (included) Three-year limited warranty; one-year free service This rotary laser features a rough-and-tough rotary cage to help prevent wear and tear on the rotary head if it happens to fall to the floor; additionally, this cage is comprised of several thin struts that ensure consistent power while preventing blind spots from getting in the way of performance. Most importantly, the DW074KD"s beam is clear and easy to see up to 100 feet indoors and up to 600 feet (in diameter) when outside. And to help protect against less-than-perfect weather conditions, the housing is extra durable. Warranty This DEWALT tool is backed by three-year limited warranty covering any defects due to faulty materials or workmanship (from the date of purchase). It"s also covered by DEWALT"s one-year free service contract, where DEWALT will maintain the tool and replace worn parts caused by normal use--for free. What"s in the Box DEWALT DW0742 detector and clamp; one DW0740 wall mount; target card; contractor"s bag; two D-sized batteries; one nine-volt battery; operating instructions Includes wall mount for interior use (view larger).