The DW071 is a manually leveled rotary laser that has dual side-by-side laser diodes for an extremely bright beam. Powered by three D-size batteries, the laser is accurate to plus or minus 1/4 inch at a radius of 100 feet, with a visible diameter of 200 feet. With the digital detector, you can extend your exterior or interior range to 600 feet. The laser is protected by a die-cast protective cap and side impact roll cage for job site durability. The built-in bump sensor alerts the user if the laser is accidentally bumped after it is leveled, ensuring an accurate and consistent beam. The DW071 can be oriented level or plumb for all the common applications. The DW071KD includes the rotary laser, three D-size batteries, wall mount, laser target card, laser enhancement glasses, digital laser detector and clamp, and carrying case.