The Topcon RL-H5B Horizontal Self-Leveling Rotary Laser is an accurate construction laser that is perfect for excavating, grading, and other general construction applications. Using the LS-80L laser receiver, this rotary laser offers long-range operation up to 1,312 ft. with an accuracy of 1/8 in. at 100 ft. Also, the RL-H5B horizontally self-levels within 5°. This Topcon self-leveling rotary laser uses a Class 2 visible red laser for indoor or outdoor use. Packed with advanced features, the RL-H5B laser level enables site engineers to conveniently use the device by pressing 1 button. It is capable of 600 rotations per minute and comes with an out-of-level notification that lets the device automatically re-level when disturbed. Using 4 D-cell alkaline batteries, the Topcon RL-H5B laser operates up to 100-hours with continuous use. It has an IP66 protection rating that protects the rotary laser from dust and water or even rainfall.