A Rotary Laser Level - Self-Leveling: Automatically Adjusts To Ensure Accurate Leveling - Long-Range Visibility: Can Project A Level Line Over Long Distances - Durable Design: Suitable For Use In Various Environments - Construction: Ensuring Accurate Installation Of Floors, Ceilings, And Walls - Alignment: Aligning Cabinets, Shelves, And Other Fixtures - Surveying: Determining Property Boundaries And Reference Points.