For long distance outdoor leveling and grading projects, where reliable accuracy and stability are a must, use the LL500 Laser. With a range of 1,600 feet and 360-degree spin, the LL500 is designed for easy one-person operation. The LL500 is also self-leveling and has built in temperature compensation control to simplify the job and guarantee accuracy. The “Out-Of-Level” alert provides user notification if there is any movement of the laser, reducing the need for expensive rework.