The Topcon RL-H5A Horizontal Self-Leveling Rotary Laser is a multi-purpose laser ideal for grading, excavating, site preparation, concrete works, and other general construction projects. When used with a receiver, it offers a long operating range up to 2,600 feet in diameter. This laser level also offers an accuracy of up to 1/16" at 100 feet and is self-leveling within 5 degrees. For added precision and accuracy, the RL-H5A features a manual single-axis leveling mode and rotates 600 times per minute. This horizontal rotating laser is simple to use, intuitive, and re-levels itself immediately if the device is disturbed on the job. With an IP66 rating, the Topcon RL-H5A is protected from dust and low-pressure water jets. This rotary laser uses either a dry cell or a rechargeable battery that can power the device up to 100 hours, making it the great companion for a long day at work.