Compact Self-Leveling Cross Line Laser with Clamp Projects bright lines; ideal for tile alignment, wall studding, windows, doors, etc. Accuracy: 1/4 in. at a range of 30 ft. Three laser-line modes: Level, Plumb and Cross-Line Self-leveling capability when within 4Degree of level Includes easy to adjust clamp for multiple applications Class II laser product, Output &lt; 1mW