The DeWalt DW074KD Self Leveling Interior/Exterior Horizontal Rotary Laser is ideal for installation, construction, home improvement or other tasks such as working with concrete, installing a ceiling grip, or building outdoor patios and/or decks.  The arrow buttons of the DW074KD Rotary Laser, used for manual leveling in vertical mode, are far more intuitive than traditional knobs. Features: Horizontal self-leveling provides quick and easy set-up Enclosed leveling vial, for manual leveling in vertical mode, stands up to jobsite conditions Protected rotary head and weatherproof design provide both interior and exterior jobsite durability Digital laser detector extends interior and exterior range to 600-Feet Standby mode allows the user to pause the laser while transitioning from horizontal to vertical What's In The Box: DeWalt DW074KD Self Leveling Interior/Exterior Rotary Laser DW0742 Digital laser detector DW0740 Wall mount Target Card Two D Size Alkaline Batteries