The Topcon RL-H5A is a top-of-the-line rotary laser, designed to level construction sites with precision and ease. It is an ideal tool for professionals in the excavation, concrete, landscaping, and other general construction industries. The H5A touts an impressive range, emitting a laser beam up to 2,600 feet with an exceptional accuracy of ±1/16 inch at 100 feet. The H5A is equipped with the industry standard self-leveling capabilities that can adjust within a range of ±5 degrees. In addition, it has manual slope built in allowing a user to manually grade up to 5%. This Topcon RL-H5A package includes the rl-H5A rotary laser, an LS-80X, the Holder 6 receiver bracket to mount the LS-80 receiver to a grade rod, and a hard carrying case. Self-leveling range : ±5 degrees. Accuracy : ±1/16 inch at 100 feet (±1.5 mm at 30 meters). Working range (diameter) : Up to 2,600 feet (800 meters) with detector. Grading: 5% Manual Slope. Rotation speed : 600 RPM. Battery life : Approximately 100 hours (alkaline batteries). Operating temperature range : -4°F to 122°F (-20°C to 50°C). Dimensions : 7.7″ x 8.3″ x 6.9 (195 x 210 x 175 mm). Weight : 5.5 lbs (2.5 kg). Laser diode : 635nm (visible). (1) Topcon RL-H5A Horizontal Self-Leveling Rotary Laser (Alkaline Batteries). (1) Sensor Holder 6 Receiver Mounting Bracket. (1) Hard Carrying Case.