The Spectra Precision® LL500 Laser Level is a one-person leveling system designed for longer range measurements across your entire site. Accurate, stable and reliable, the LL500 Laser Level features a 1,600 ft (500 m) working diameter which increases productivity by reducing the need for multiple setups on a large job site. The rugged LL500 is self-leveling with built-in “”out-of-level” shutoff that maintains accuracy over the entire work area and minimizes errors. Visible “spotting” beam determines receiver mounting placement makes it faster to find the on-grade position